jimmyxgong@chromium.org cros-device-enablement@google.com Record which shortcuts are being used for an action. Fires when the use perform an action using a keyboard shortcut. A shortcut is encoded as an int where the high 16 bits represent all the modifiers used, and the 0-15 bits represent which key is used. jimmyxgong@chromium.org longbowei@google.com cros-device-enablement@google.com Record which desk the user switches to. Fires when the user switches desk to a specific index using a keyboard shortcut. Warning: this histogram was expired from 2026-05-11 to 2026-08-06; data may be missing. jimmyxgong@chromium.org cros-device-enablement@google.com Record which type of keyboard activates a given screenshot action utilizing the overview key. The options are [Non-ChromeOS Keyboard, ChromeOS Keyboard with a screenshot key, or ChromeOS Keyboard without a screesnhot key]. Warning: this histogram was expired from 2026-05-11 to 2026-08-06; data may be missing. jimmyxgong@chromium.org cros-device-enablement@google.com Action triggered by pressing toggle picker accelerator. Warning: this histogram was expired from 2026-05-11 to 2026-08-06; data may be missing. xdai@chromium.org chromeos-wm@google.com Captures usage of Alt+[ and Alt+]. cowmoo@google.com cros-p13n-eng@google.com Emitted when the ambient mode photo transition animation completes to report the smoothness of this animation. 100% represents ideally smooth 60 frames per second. cowmoo@google.com cros-p13n-eng@google.com Among eligible users, whether the user has Ambient mode enabled. Recorded once for every UMA upload. The set of eligible users includes all users with profiles that can allow Ambient mode to be enabled. This is limited by profile type, whether the user is primary, if the user has a supported email, etc. cowmoo@google.com cros-p13n-eng@google.com Among eligible users with ambient mode enabled, records the length of each session. The metric is emitted when ambient mode is ended. 2 new animated ambient mode themes have been added started in M104. cowmoo@google.com cros-p13n-eng@google.com Background initialization tasks must be completed successfully before the ambient UI can be launched. For example, slide show mode must download an initial set of photos from the server before the UI can be rendered. This records the initialization success/failure count per ambient setting; each ambient setting (slide show, video, etc) has a different initialization process. This is emitted each time ash tries to launch the ambient UI. cowmoo@google.com cros-p13n-eng@google.com Emitted periodically while {Settings} is rendering in ambient mode. 100% represents ideal smoothness. cowmoo@google.com cros-p13n-eng@google.com Among eligible users with ambient mode enabled, records the source of ambient mode photos. Recorded once for every UMA upload. cowmoo@google.com cros-p13n-eng@google.com Among eligible users with ambient mode enabled, records the selected number of personal photo albums. Recorded once only when users make a selection on the personal photo albums on Settings page. cowmoo@google.com cros-p13n-eng@google.com Records the amount of time it takes for {Settings} in ambient mode to start. This includes tasks such as downloading an initial set of photos from IMAX server, decoding them, loading the animation from resource pak, etc. Note this measurement does not include the lock screen inactivity timeout (currently 7 seconds). So ideally, this should be 0. Also note that ambient mode should start after a 10 second timeout if at least 1 photo has been downloaded from IMAX. Hitting the 10 second timeout is considered non-ideal, but acceptable behavior. However, anything over that is very bad. Thus, this histogram has a 15 second maximum (added a 5 second buffer to the timeout just to be safe). Anything over the 15 second maximum goes in the overflow bucket and is considered a total failure to start ambient mode. This should be extremely rare. Emitted each time the {Settings} UI starts rendering, or when ambient mode exits in the event that the UI never started rendering. cowmoo@google.com cros-p13n-eng@google.com Emitted when screen saver starts running. Logs the topic source of the screen saver. cowmoo@google.com cros-p13n-eng@google.com Among eligible users with ambient mode enabled, records the total number of personal photo albums. Recorded once only when users make a selection on the personal photo albums on Settings page. cowmoo@google.com cros-p13n-eng@chromium.org Emitted at the end of each ambient mode session that renders {Settings}. Only applies to ambient video themes. Tracks whether video playback started successfully in each ambient video session. Ideally, there are nothing but success and loading statuses being recorded (the latter should be rare because it means the user killed the session right as the video was being loaded). cowmoo@google.com cros-p13n-eng@chromium.org Emitted at the end of each ambient mode session that renders {Settings}. Only applies to ambient video themes. Tracks the total number of frames created divided by the total number of frames expected during the entire ambient session. 100% represents ideal smoothness, and any deviation from that is due to dropped video frames. This metric requires a minimum of ~5 seconds of playback (~100 expected videos frames) to be recorded; ambient video sessions shorter than that are not statistically significant enough to record and will not be tracked. As such, this metric is just a general gauge of the video's performance in the field. Separate fine-grained metrics tracking rebuffering frequency and duration may be added in the future. khmel@chromium.org arc-performance@google.com cros-sw-perf@google.com For each user after they opted-in into ARC++, records the duration of initial apps installation. Duration is measured as an interval between the opt-in and the moment when all default apps become either "ready" or "update error". This is only reported within the same opt-in session, and is not reported if default apps were not installed within the session. iscsi@google.com cros-lurs@google.com Records when the active session auth dialog closed during authentication. It means the user already submitted their password or pin, but didn't wait for the result. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com Records the success outcome of the authentication on the active session auth dialog. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com Records the authentication input type when authentication fails on the active session dialog. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com The number of fingerprint attempts while the active session auth dialog was opened. Recorded when the active session auth dialog closes. Warning: this histogram was expired from 2025-10-05 to 2025-11-25; data may be missing. iscsi@google.com cros-lurs@google.com Records the reason for an authentication request when no authentication factors were available. Recorded when the active session authentication dialog is triggered, but cryptohome reports no configured authentication factors. iscsi@google.com cros-lurs@google.com The amount of time the active session auth dialog remained opened. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com The number of password attempts while the active session auth dialog was opened. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com The number of pin attempts while the active session auth dialog was opened. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com Records the authentication input type when authentication happened. Recorded when the authentication starts on the active session auth dialog. iscsi@google.com cros-lurs@google.com Records the authentication input type when authentication succeeded. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com Records successful passwordless user authentications. Recorded when the active session auth dialog closes. iscsi@google.com cros-lurs@google.com Records the authentication reason why the active session auth dialog was opened. Recorded when the active session auth dialog opens. cwd@google.com ckwyee@google.com The battery charge percent when {BatteryPercentWhen} cwd@google.com ckwyee@google.com How long battery saver was enabled. Logged when {DurationWhen} cwd@google.com ckwyee@google.com The battery time to empty when battery saver is {TimeToEmptyWhen}. Only logged when an estimate is available. jamescook@chromium.org chromeos-launcher@google.com Records true if the user clicks on any chip on the birch bar. jamescook@chromium.org chromeos-launcher@google.com Records true if the user was presented with the birch bar and it had one or more chips visible. jamescook@chromium.org chromeos-launcher@google.com Recorded when the user clicks or taps on a chip of a given type. jamescook@chromium.org chromeos-launcher@google.com The ranking of a chip from the triggers and priorities specification. Recorded when the user clicks or taps on a chip. jamescook@chromium.org chromeos-launcher@google.com The type of the chip the user clicked or tapped. Recorded the {When} time the user clicks or taps on a chip in a login session. jamescook@chromium.org chromeos-launcher@google.com Recorded when the user is shown a chip of a given type. zxdan@chromium.org chromeos-launcher@google.com The number of chips when the birch bar is shown to the user. May be zero if there were no chips to show. zxdan@chromium.org cros-coral@google.com Recorded when a coral cluster is restored, launched to a new desk, and saved as a desk templated. zxdan@chromium.org cros-coral@google.com The number of coral items shown in the birch bar when the user enters overview. zxdan@chromium.org cros-coral@google.com Recorded whenever a user expands a coral BirchChipButton. Can be recorded multiple times during the lifetime of the BirchChipButton. zxdan@chromium.org cros-coral@google.com The number of coral items removed by user from the chevron expanded menu. conniekxu@chromium.org cros-coral@google.com Record the thumbs up/thumbs down feedback for coral grouping suggestion from the user. Emits true if the feedback is positive, false otherwise. zxdan@chromium.org cros-coral@google.com The number of {TabOrApp} info with an empty title. zxdan@chromium.org chromeos-launcher@google.com The number of results of {Type} type returned by the data provider. The results were not necessarily shown to the user (based on ranking). anasr@google.com cros-edu-eng@google.com Records why receiving captions was turned off at the consumer, whether this was by the user turning off captions, or ending the session or because of a request error that needs user manual retry. anasr@google.com cros-edu-eng@google.com Records why sending captions was turned off at the producer, whether this was by the user turning off captions, or ending the session or because of a request error that needs user manual retry. anasr@google.com cros-edu-eng@google.com Records why the captions receiving stream was ended. anasr@google.com cros-edu-eng@google.com Records the net error or HTTP response code of the {Request} request needed to send/receive captions in a Class Tools session. anasr@google.com cros-edu-eng@google.com Records the OAuth token fetch result for BabelOrca requests. caott@google.com cros-edu-eng@google.com Records the number of active students left when the session ends. caott@google.com cros-edu-eng@google.com Records the number of students joined via code throughout a session. caott@google.com cros-edu-eng@google.com Records the maximum number of tabs shared by the provider throughout a session. caott@google.com cros-edu-eng@google.com Records the number of tabs shared by the provider when the session ends. aprilzhou@google.com cros-edu-eng@google.com Records when an OAuth flow is triggered during the OnTask session. aprilzhou@google.com cros-edu-eng@google.com Records the percentage of the duration the session was in {State}. aprilzhou@google.com cros-edu-eng@google.com Records scheduled boca session polling result from out of and in-session. bzielinski@google.com cros-edu-eng@google.com Records the reason that attempting to start a screen share presentation of type PresentStudentScreen failed. Recorded once per failed screen share attempt. Warning: this histogram was expired from 2026-04-25 to 2026-07-22; data may be missing. bzielinski@google.com cros-edu-eng@google.com Records the reason that attempting to start a screen share presentation of type {PresentOwnScreenType} failed. Recorded once per failed screen share attempt. Warning: this histogram was expired from 2026-04-25 to 2026-07-22; data may be missing. bzielinski@google.com cros-edu-eng@google.com Records the result of attempting to start a screen share presentation of type {ScreenShareType}. Recorded once per screen share attempt. Warning: this histogram was expired from 2026-04-25 to 2026-07-22; data may be missing. caott@google.com cros-edu-eng@google.com Records HTTP response code of the {Request} request needed to register host for view screen in a Class Tools session. anasr@google.com cros-edu-eng@google.com Records whether Gemini status is enabled or disabled for the student. Recorded once per session when the student joins. anasr@google.com cros-edu-eng@google.com Records whether Gemini status is enabled or disabled. Recorded when the teacher requests the Gemini status. aprilzhou@google.com cros-edu-eng@google.com Records the number of validation and non-validation token Retrievals. Warning: this histogram was expired from 2026-04-28 to 2026-07-22; data may be missing. aprilzhou@google.com cros-edu-eng@google.com Records HTTP response code of the {Request} request needed to send/receive captions in a Class Tools. hidehiko@chromium.org junis@chromium.org oshima@chromium.org Making sure nobody in the production calls the ProfileManager::GetPrimaryUserProfile() in unexpected timing. This entry will not have "false" status. hidehiko@chromium.org junis@chromium.org oshima@chromium.org Identify any of the callers that use ProfileManager::Get{UserType}UserProfile() APIs at unexpected timing. The recorded data is the hash of the caller location. Because there're too many possible callers but we expect the number of actual callers is small, we do not list all possible callers as enum, but will process it separately later offline. Thus, the dashboard will show just the hash number. kradtke@chromium.org cros-status-area-eng@google.com Records which keys are used when the user navigates the Monthly Calendar View accessible from Quick Settings and system tray with the keyboard. Triggered when user shifts focus from a Calendar element to another by pressing tab, or when navigating Calendar Date Cells with the arrow keys. newcomer@google.com cros-status-area-eng@google.com Recorded when the "Join" meeting button is pressed from the Calendar "EventListView" i.e. the user opens the sys tray calendar, taps todays date cell, then scrolls to the event and taps the "Join" meeting button. newcomer@google.com cros-status-area-eng@google.com Records the number of currently visible events shown to the user when the Calendar Event List view displays in one day. i.e. the user opens the sys tray calendar, clicks on a date cell and sees 2 events, this metric will track a count of 2. samcackett@google.com cros-status-area-eng@google.com Recorded whenever a user sees any calendar event in the CalendarView. Recorded once per lifetime of the calendar view. jiamingc@google.com cros-status-area-eng@google.com Recorded when a fetched calendar list is filtered for selected calendars. Records the number of calendars in the response that are selected. jiamingc@google.com cros-status-area-eng@google.com Recorded when there are no outstanding calendar event fetches for a month. The total size of the month's events. jiamingc@google.com cros-status-area-eng@google.com Recorded when the calendar is closed. The total number of months cached for calendar events while it was open. jiamingc@google.com cros-status-area-eng@google.com Recorded when the final calendar event fetch for a month returns and Multi- Calendar is enabled. Records the time elapsed from the first fetch that is started to the last fetch that is completed. jiamingc@google.com cros-status-area-eng@google.com Recorded when the {DataType} fetch returns. The duration of the fetch request. jiamingc@google.com cros-status-area-eng@google.com Recorded when the {DataType} fetch returns. The recorded enum value indicates the return code of the fetch request. jiamingc@google.com cros-status-area-eng@google.com Recorded when {DataType}s are requested and the request goes too long without a response. newcomer@chromium.org cros-status-area-eng@google.com Records the maximum absolute distance from today that a user has browsed in the calendar. Recorded when the calendar is closed. kradtke@chromium.org cros-status-area-eng@google.com Records the time a user spends in a calendar month. Records the time when the user either scrolls to another month or closes the CalendarView. jiamingc@google.com cros-status-area-eng@google.com The source of scrolling in calendar view. Recorded when the calendar is scrolled and changed to another month (note that scrolls resulting in no month change are not recorded). newcomer@google.com cros-status-area-eng@google.com Recorded when the calendar view is shown from the {ViewShowSource}. newcomer@google.com cros-status-area-eng@google.com Measures the time from open of CalendarView, to CalendarDateCellView representing today receives events. Recorded once per lifetime of CalendarViewController (once per show), when todays CalendarDateCellView receives event data. newcomer@google.com cros-status-area-eng@google.com Measures the time from open of CalendarView, to CalendarDateCellView representing today receives events when Multi-Calendar is enabled. Recorded once per lifetime of CalendarViewController (once per show), when todays CalendarDateCellView receives event data. newcomer@google.com cros-status-area-eng@google.com Records the number of currently visible upcoming events shown to the user when the Calendar "Up next" view displays. i.e. the user opens the sys tray calendar, "Up next" displays 2 upcoming events, this metric will track a count of 2. newcomer@google.com cros-status-area-eng@google.com Recorded when an upcoming event is pressed from the Calendar "Up next" view and launched in Google Calendar. i.e. the user opens the sys tray calendar, "Up next" displays an event in the next 10 mins and the user taps the event. newcomer@google.com cros-status-area-eng@google.com Recorded when the "Join" meeting button is pressed from the Calendar "Up next" view i.e. the user opens the sys tray calendar, "Up next" displays an event in the next 10 mins and the user taps "Join" meeting button on the event. jiamingc@google.com tbarzic@google.com cros-status-area-eng@google.com User actions recorded when the user interacts with Calendar in Chrome OS System UI. jiamingc@google.com tbarzic@google.com cros-status-area-eng@google.com User actions in Chrome OS Calendar System UI that result in Google Calendar web UI being opened. Recorded when the user interacts with the Chrome OS Calendar System UI. newcomer@google.com cros-status-area-eng@google.com Recorded when the calendar view is destroyed, records the lifetime of the CalendarView object, which corresponds with the user journey time of the calendar. newcomer@google.com cros-status-area-eng@google.com Recorded when the {CalendarChildView} is activated. newcomer@google.com jiamingc@google.com cros-status-area-eng@google.com Recorded when the close event list animation is finished. jiamingc@google.com cros-status-area-eng@google.com The time to build the CalendarView, recorded when CalendarView is constructed, which happens every time the calendar is shown from the status area. newcomer@google.com samcackett@google.com cros-status-area-eng@google.com Animation smoothness recorded when the up next view fades in. 60 fps is 100% smoothness and so ideally we should see smoothness > 80%. newcomer@google.com sylvieliu@google.com cros-status-area-eng@google.com Animation smoothness recorded when the up next view fades out. 60 fps is 100% smoothness and so ideally we should see smoothness > 80%. newcomer@google.com jiamingc@google.com cros-status-area-eng@google.com Recorded when the on month changed animation is finished. newcomer@google.com jiamingc@google.com cros-status-area-eng@google.com Recorded when the open event list animation is finished on the {CalendarChildView}. The metric is expired from 2023-02-18 to 2023-03-15, so it's possible some data is dropped during that time. newcomer@google.com jiamingc@google.com cros-status-area-eng@google.com Recorded when the scroll one month animation is finished on the {CalendarChildView}. newcomer@google.com jiamingc@google.com cros-status-area-eng@google.com Recorded when the {Animation} animation is finished on the {CalendarChildView}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded at the end of a capture mode session in {TabletOrClamshellMode} to report the user's audio recording mode setting, only if video recording was selected, and the recording type supports audio recording. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever a button from the bar widget displayed in Capture mode is pressed in {TabletOrClamshellMode}. The recorded enum value indicates the type of the button pressed. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the number of camera disconnections in {TabletOrClamshellMode} during recording. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records how many seconds it takes a camera that got disconnected to get reconnected again within the grace period in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever a user performs a screen capture in {TabletOrClamshellMode}. The recorded enum indicates the configuration used for the capture. I.e. the capture source and the capture type. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever a user is in a region capture session in {TabletOrClamshellMode} and performs a capture or they switch the capture source. The recorded count indicates the number of times the user adjusts the region. This counts each time they move the region or resize it. It is reset whenever a user creates a new region or the count is recorded. Warning: this histogram was expired from 2025-02-23 to 2025-04-08; data may be missing. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the number of consecutive screenshots the user takes within 5s of each other, regardless of capture options. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records whether a capture mode video recording starts with demo tools feature enabled or not in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever capture mode screen recording is ended in {TabletOrClamshellMode}. The recorded enum value indicates the reason that lead to ending the screen recording. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever Capture mode is entered from {TabletOrClamshellMode}. The recorded enum value indicates the method used to enter Capture mode. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever the screen capture is saved in {TabletOrClamshellMode} when captured by the Game Dashboard intiated capture session. The recorded enum value indicates the location that the screen capture is saved. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the size of the successfully recorded WebM file by the Game Dahboard initiated capture mode in {TabletOrClamshellMode}. This metric will not be recorded if a file was not successfully saved. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the size of the successfully recorded GIF file by capture mode in {TabletOrClamshellMode}. This metric will not be recorded if a file was not successfully saved. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the time of a successful GIF recording in capture mode in {TabletOrClamshellMode}. This metric will not be recorded if a file was not successfully saved. The upper limit of this histogram is 3 hours. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the percent ratio between the area of the user selected region for GIF recording to the area of the full screen in {TabletOrClamshellMode}. Emitted only when GIF recording is about to start. xdai@chromium.org chromeos-wm@google.com Recorded whenever an image search completes using Sunfish. The recorded enum value indicates success or various failures. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the number of connected cameras to the device whenever it changes. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever a user is in a region capture session in {TabletOrClamshellMode} entered from the projector app and performs a capture or they switch the capture source. The recorded count indicates the number of times the user adjusts the region. This counts each time they move the region or resize it. It is reset whenever a user creates a new region or the count is recorded. minch@chromium.org zxdan@chromium.org chromeos-wm@chromium.org Track all quick actions on screenshot notification. Including: Edit in backlight, Go to Files, Delete File. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the camera preview position when the recording is started in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the camera size when the recording is started in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records whether a capture mode video recording starts with camera or not in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever screen capture is saved in {TabletOrClamshellMode}. The recorded enum value indicates the location that the screen capture is saved. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the size of the successfully recorded WebM file by capture mode in {TabletOrClamshellMode}. This metric will not be recorded if a file was not successfully saved, or if it was recorded for Projector. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the time of a successful video recording in capture mode in {TabletOrClamshellMode}. This metric will not be recorded if a file was not successfully saved. The upper limit of this histogram is 3 hours. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the number of screenshots that have been taken via the CaptureModeController every 24 hours. Note that counts are not persisted across crashes, restarts, or sessions so this is only intended to give a rough approximation. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the number of screenshots that have been taken via the CaptureModeController every 7 days. Note that counts are not persisted across crashes, restarts, or sessions so this is only intended to give a rough approximation. This means that this metric will only be recorded in sessions spanning at least 7 days. xdai@chromium.org chromeos-wm@google.com Recorded each time the Search button is pressed in a default capture session in {TabletOrClamshellMode}. xdai@chromium.org chromeos-wm@google.com Recorded each time the Search button is shown to a user in a default capture session in {TabletOrClamshellMode}. xdai@chromium.org chromeos-wm@google.com Recorded each time a search result URL was clicked in the search results panel in {TabletOrClamshellMode}. xdai@chromium.org chromeos-wm@google.com Recorded whenever the search results panel is created during a capture session, either due to selecting a region (without an existing panel) in a Sunfish session, or clicking the search button in a default session. The recorded enum value indicates the entry point. xdai@chromium.org chromeos-wm@google.com Recorded each time the search results panel was shown, including panel creation, region adjustment, and region reselection, in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Emits true if a user has switched capture modes (fullscreen, region, window) while in a capture mode session, false otherwise. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever the capture folder is switched to default downloads folder in {TabletOrClamshellMode}. The recorded enum value indicates the reason that leads to the switching. xdai@chromium.org chromeos-wm@google.com Recorded whenever text detection completes using Sunfish. The recorded enum value indicates success with no text detected, success with text detected, or various failures. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded at the end of a {Client}-initiated capture mode session in {TabletOrClamshellMode} to report the user's audio recording mode setting, only if video recording was selected, and the recording type supports audio recording. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded whenever a {Client}-initiated a screen capture is performed in {TabletOrClamshellMode}. The recorded enum indicates the configuration used for the Game Dashboard initiated capture, i.e. the capture source and the capture type. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records whether a {Client}-initiated recording starts with demo tools feature enabled or not in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records whether a {Client}-initiated recording starts with camera on or not in {TabletOrClamshellMode}. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the time of a successful video recording in capture mode entered from the client session in {TabletOrClamshellMode}. This metric will not be recorded if a file was not successfully saved. The upper limit of this histogram is 3 hours. longbowei@google.com zhangwenyu@google.com cros-families-eng@google.com Records the outcome of webview authentication when it finishes. Allows for tracking the authentication success rate. Recorded for ChromeOS only. longbowei@google.com zhangwenyu@google.com cros-families-eng@google.com Records the state at which the Content Transfer app was exited by the user. Allows for tracking the drop rate at different stages of the flow. Recorded for ChromeOS only. longbowei@google.com zhangwenyu@google.com cros-families-eng@google.com Recorded when showing the Content Transfer app nudge to a user has failed. Recorded for ChromeOS only. amitrokhin@google.com chromeos-launcher@google.com Records the contextual Google integration status (whether it's enabled, or disabled because of policy / app / URL block). minch@chromium.org changmar@chromium.org Emitted true when the user switched to dark mode through toggling the (Dark theme) feature pod button inside system tray menu. Emitted false if the user switched to light mode through toggling this button. ChromeOS only. tclaiborne@chromium.org chromeos-wm@google.com Emitted when the virtual desks activation animation begins, to report the latency of starting this animation. In a continuous desk animation, this metric is recorded only for the first desk switch. tclaiborne@chromium.org chromeos-wm@google.com Emitted when the virtual desks removal animation begins, to report the latency of starting this animation. In a continuous desk animation, this metric is recorded only for the first desk switch. tclaiborne@chromium.org cros-sw-perf@google.com Emitted when the virtual desks activation animation completes to report the smoothness of this animation when running on the display on which the active window resides (if any) or the display of the primary root window. 100% represents ideally smooth 60 frames per second. xdai@chromium.org tclaiborne@chromium.org chromeos-wm@google.com When a four finger touchpad swipe has ended, an animation to the nearest desk will occur. This histogram is emitted when that animation finishes. 100% represents ideally smooth 60 frames per second. tclaiborne@chromium.org chromeos-wm@google.com Emitted when the virtual desks removal animation completes to report the smoothness of this animation when running on the display on which the active window resides (if any) or the display of the primary root window. 100% represents ideally smooth 60 frames per second. zxdan@chromium.org chromeos-wm@google.com Emitted when a window is assigned to all desks. E.g. `Move to Desks menu` which can be accessed from a window's context menu or keyboard shortcuts. This is not emitted when a window is unassigned from all desks. As of M99, this should be used as the source of truth for the usage of the assign to all desks feature. aprilzhou@google.com chromeos-wm@google.com Emitted after a virtual desk being removed with close all option and undo toast being shown. This metric describes the total number of times the user chooses to close a desk with its windows, regardless of whether that action is undone. aprilzhou@google.com chromeos-wm@google.com Emitted after a virtual desk being removed with close all option and undo toast being clicked. Warning: this histogram was expired from 2025-02-10 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emitted when a desk is destroyed or a user activates a desk they haven't visited the prior day. In the former case, reports the number of consecutive days a user visited the newly-closed desk. In the latter case, reports the number of consecutive days a user visited the desk during the previous visit. This metric is persisted across multiple sessions and restarts. I.e. if a user logs out and logs back in their desk's consecutive daily visits will be restored. This metric uses the user's local timezone so if they move back in time via timezone change, this metric will be reset. xdai@chromium.org chromeos-wm@google.com Emitted when a user with more than one desk changes the name of a desk to specify how many of the user's desks have custom names. xdai@chromium.org chromeos-wm@google.com Emitted when a user with more than one desk confirms the name of a desk to specify how often users create custom names. xdai@chromium.org chromeos-wm@google.com Emitted when a user with more than one desk changes the name of a desk to specify the percentage of the user's desks that have custom names. xdai@chromium.org chromeos-wm@google.com Records the presentation time, which is the time in milliseconds it takes from when the desk button desk bar enter event was received and successfully processed to when the next frame is shown to the user. xdai@chromium.org chromeos-wm@google.com Records the presentation time, which is the time in milliseconds it takes from when the desk button desk bar exit event was received and successfully processed to when the next frame is shown to the user. xdai@chromium.org chromeos-wm@google.com Emitted when a user decides to hide the desk button to specify how often users are deliberately choosing to hide the button. xdai@chromium.org chromeos-wm@google.com Emitted when a user presses on the central button on the desk button to specify how often users are using the center button to open or close the desk bar. xdai@chromium.org chromeos-wm@google.com The lifetime of the desk at index {DeskIndex} (1-indexed). Emitted when a desk is removed. This metric is persisted across multiple sessions and restarts. I.e. if a user logs out and logs back in their desk's lifetime will be restored. xdai@chromium.org chromeos-wm@google.com Emitted when there's a change in the virtual desks count whether due to desk creation or removal in Bento. Specifies the number of available desks. It is not emitted for the first-ever created default desk. xdai@chromium.org chromeos-wm@google.com Emitted when the active desk is changed to specify the source of this action, i.e. whether due to new-desk shortcut, desk removed, window activated, switch-desk shortcut, or a press on the desk mini_view. Note: the bucket for user switching was previousy emitted to at session startup which meant that it was artificially inflated. As of M123, these events now end up in the session restore bucket. xdai@chromium.org chromeos-wm@google.com Emitted when a starting or ending screenshot succeeded or failed. xdai@chromium.org chromeos-wm@google.com Emitted when a window is moved from the current active desk to another desk. Specifies the source of this action, i.e. whether to window drag-and-drop, or keyboard shortcut. As of M90, the "Assign to desk menu" bucket is emitted when a user assigns a window to all desks through its context menu. Prior to this, the "Assign to desk menu" bucket was emitted when a user switched desks and their All Desks windows were moved from the old active desk to the new active desk. As of M99, the "Assign to desk menu" no longer tracks the assign to all desks source. The replacement is "Ash.Desks.AssignToAllDesksSource". xdai@chromium.org chromeos-wm@google.com Emitted when a virtual desk is created to specify the source of this action, i.e. whether from the new-desk button, keyboard shortcut, or due to desks restore. It is not emitted for the first-ever created default desk. xdai@chromium.org chromeos-wm@google.com Tracks the number of times a desk (virtual workspace) has visibly changed in a time span of five seconds. This counts the number of total traversals; for example if the user has moved from desk 1 to 2 to 1 to 2 to 3, the number recorded is 4. This only gets recorded if a traversal starts. A traversal means that the desk has changed onscreen. xdai@chromium.org chromeos-wm@google.com Emitted when a virtual desk is removed and all windows on the desk being closed to record the total number of windows being closed by this operation. Emitted only for close-all. xdai@chromium.org chromeos-wm@google.com Emitted when a virtual desk is removed and all windows on the desk being closed by {RemovalSource} to record the total number of windows being closed by this operation. Emitted only for close-all. xdai@chromium.org chromeos-wm@google.com The number of windows on the first desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the tenth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the eleventh desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the twelfth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the thirteenth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the fourteenth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the fifteenth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the sixteenth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the second desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the third desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the fourth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the fifth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the sixth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the seventh desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the eighth desk. Emitted when a desk is removed, or a window is moved to another desk. xdai@chromium.org chromeos-wm@google.com The number of windows on the ninth desk. Emitted when a desk is removed, or a window is moved to another desk. tclaiborne@chromium.org chromeos-wm@google.com Presentation time in ms when a four finger swipe is being used to change desks. One full swipe results in multiple emissions of this metric; once everytime the fingers change location on the trackpad. Presentation time is the time it takes from when the software recognizes the touchpad swipe to when the next frame is displayed on the screen. tclaiborne@chromium.org chromeos-wm@google.com The largest presentation time value in ms for a single four finger swipe to change desks. One full swipe results in one emission of this metric; its the largest value of Ash.Desks.PresentationTime.UpdateGesture which is emitted multiple times during a single full swipe. Presentation time is the time it takes from when the software recognizes the touchpad swipe to when the next frame is displayed on the frame. xdai@chromium.org chromeos-wm@google.com Emitted when a virtual desk is removed to specify the source of this remove operation, i.e. whether from the close-desk button, or keyboard shortcut. aprilzhou@google.com chromeos-wm@google.com Emitted when a virtual desk is removed to specify the category of this remove operation among close all, combine desk, and close all and wait. Warning: this histogram was expired from 2024-07-21 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com The number of unique weekly active desks a user has interacted with in a week. A desk is considered interacted with if a window is moved to it, it is created, its name is changed, or it is activated and stayed on for at least 3s. This metric is persisted across multiple sessions and restarts. I.e. if a user logs out and logs back in. This metric is reported a week after it begins counting. If a session is restored and more than a week has elapsed since counting has begun, the restored data will be emitted as an entry and this metric will be reset. xdai@chromium.org chromeos-wm@google.com Emitted when a user {BarAction} using the {EntryPoint} desk bar to specify how often users are using the {EntryPoint} desk bar to perform these actions. xdai@chromium.org chromeos-wm@google.com Emitted when an admin template is launched. xdai@chromium.org chromeos-wm@google.com Emitted when a desk template is added or updated to indicate result of this operation. i.e. whether this operation is successful or failed with any particular reason. xdai@chromium.org chromeos-wm@google.com Records the number of tabs in an admin template when it is launched. xdai@chromium.org chromeos-wm@google.com Records the number of windows in an admin template when it is launched. xdai@chromium.org chromeos-wm@google.com Recorded when a Save and Recall saved desk is manually deleted. xdai@chromium.org chromeos-wm@google.com Recorded when desk templates are deleted, is never false. andreydav@google.com slutskii@google.com Records the number of tabs in a Floating Workspace desk when it is saved. Warning: this histogram was expired from 2024-09-27 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Records the number of windows and tabs in a Floating Workspace desk when it is saved. Warning: this histogram was expired from 2024-09-27 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Records the number of windows in a Floating Workspace desk when it is saved. Warning: this histogram was expired from 2024-09-27 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Emitted when a Floating Workspace desk is launched. Warning: this histogram was expired from 2024-09-27 to 2025-05-23; data may be missing. xdai@chromium.org chromeos-wm@google.com Emitted when a template is launched and a desk is created, is never false. xdai@chromium.org chromeos-wm@google.com Emitted when a Save and Recall desk is launched. xdai@chromium.org chromeos-wm@google.com Recorded when a user opens the template grid, is never false. xdai@chromium.org chromeos-wm@google.com Recorded when a new Save and Recall desk is created. xdai@chromium.org chromeos-wm@google.com Recorded when a user creates a desk template, is never false. xdai@chromium.org chromeos-wm@google.com Recorded when the user replaces a Save and Recall desk. xdai@chromium.org chromeos-wm@google.com Recorded when replace dialog opens and user accepted it, is never false. xdai@chromium.org chromeos-wm@google.com Recorded when a Save and Recall desk cannot be parsed. xdai@chromium.org chromeos-wm@google.com Records the number of tabs in a Save and Recall desk when it is saved. xdai@chromium.org chromeos-wm@google.com Records the save and recall template file size that is saved to local storage. xdai@chromium.org chromeos-wm@google.com Records the number of times the unsupported Apps dialog shows. This event is triggered when a user attempts to save a Save and Recall desk that contains an unsupported app type. Currently the saved desk feature only supports PWAs, Extensions, and browser instances. xdai@chromium.org chromeos-wm@google.com Records the number of windows and tabs in a Save and Recall desk when it is saved. xdai@chromium.org chromeos-wm@google.com Records the number of windows in a Save and Recall desk when it is saved. xdai@chromium.org chromeos-wm@google.com Emitted every time the "Save desk as template" option in the desk action context menu is pressed. xdai@chromium.org chromeos-wm@google.com Emitted every time the desk action context menu opens and the saved desk options are shown. xdai@chromium.org chromeos-wm@google.com Emitted every time the desk action context menu opens and the saved desk options are not shown, but would have if the Saved Desk UI revamp feature was enabled. xdai@chromium.org chromeos-wm@google.com Emitted every time the "Save desk for later" option in the desk action context menu is pressed. xdai@chromium.org chromeos-wm@google.com Emitted every time the saved desk buttons in the overview grid are shown. xdai@chromium.org chromeos-wm@google.com Emitted every time the saved desk buttons in the overview grid are viable to be shown, but don't appear, as the Saved Desk UI revamp feature is enabled. The saved desk options should apppear in the desk context menu instead. xdai@chromium.org chromeos-wm@google.com Records the number of tabs in a template when it is saved. xdai@chromium.org chromeos-wm@google.com Records the file size of the desk template that is saved to local storage. xdai@chromium.org chromeos-wm@google.com The number of seconds between the creation of a new Save and Recall desk and its launch (and automatic deletion). xdai@chromium.org chromeos-wm@google.com Measures the amount of time it takes to launch a template from the time that the launch is invoked to the time that the last window is opened. xdai@chromium.org chromeos-wm@google.com Records the number of times the unsupported Apps dialog shows. This event is triggered when a user attempts to save a template that contains an unsupported app type. Currently the desks templates feature only supports PWAs, Extensions, and browser instances. xdai@chromium.org chromeos-wm@google.com Records the number of Save and Recall desks a user has saved when a desk is saved or deleted. xdai@chromium.org chromeos-wm@google.com Records the number of templates a user has saved when a template is saved or deleted. xdai@chromium.org chromeos-wm@google.com Records the number of windows and tabs in a template when it is saved. xdai@chromium.org chromeos-wm@google.com Records the number of windows in a template when it is saved. oshima@chromium.org cros-sw-perf@google.com The effective resolution of the internal display after device scale factor and display zoom level has been applied. This is the exact value matching the display's effective resolution. This is emitted at regular intervals. zhangwenyu@google.com cros-device-enablement@google.com The effective DPI of the {DisplayType} computed from active effective resolution and display physical size. The bucket value ranges from 50 to 500 with bucket count of 90. This is emitted at regular intervals. vincentchiang@google.com cros-sw-perf@google.com The percentage of RealPower status duration over the total duration. Recorded daily. vincentchiang@google.com cros-sw-perf@google.com The accumulated duration in ms of doze mode power scheduler has sent {PowerStatus} to arcvm. Recorded daily. tbarzic@chromium.org xdai@chromium.org Presentation time in ms when a window is dragged from the bottom of the shelf. Recorded when the drag action is in progress. Warning: this histogram was expired from 2024-09-01 to 2025-07-21; data may be missing. tbarzic@chromium.org xdai@chromium.org Maximum latency of the presentation time in ms when a window is dragged from the bottom of the shelf. Recorded when the drag action is finished. Warning: this histogram was expired from 2023-05-30 to 2025-07-21; data may be missing. mohammedabdon@chromium.org cros-3pidp@google.com Records the outcome of a call to chromeoscompliance API. Reported once per call. Chromeoscompliance API is called every time the user signs in, unlocks the device, or stays in session for 24 hours. This event would only occur if EssentialSearchEnabled policy set. vincentchiang@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com Similar to "Ash.EventLatency.TotalLatency" but tracks total latency of 5 core events (MouseDragged/MousePressed/MouseReleased/KeyPressed/KeyReleased) for ash UI, from when the user input causing the event is generated until the frame caused by the event is submitted by the GPU service and presented successfully on the screen. This histogram only records metrics on machines with high-resolution clocks. vincentchiang@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com Records the latency of an input event, from when it was created to when its corresponding frame was presented on the screen, broken down by event type and display refresh rate. This metrics is recorded for core event {CoreEventType} under {Fps}. This histogram only records metrics on machines with high-resolution clocks. vincentchiang@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com Tracks total latency of all types of event for ash UI, from when the user input causing the event is generated until the frame caused by the event is submitted by the GPU service and presented successfully on the screen. This histogram only records metrics on machines with high-resolution clocks. vincentchiang@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com Tracks total latency of {EventType} for ash UI, from when the user input causing the event is generated until the frame caused by the event is submitted by the GPU service and presented successfully on the screen. This histogram only records metrics on machines with high-resolution clocks. kawasin@google.com baseos-perf@google.com Tracks total latency of {EventType} for ash UI, from when the user input causing the event is generated until the frame caused by the event is submitted by the GPU service and presented successfully on the screen. This histogram only records metrics on machines with high-resolution clocks. This metric is only recorded for 1 minute after the device is resumed. aluh@chromium.org vsavu@google.com chromeos-consumer-extended-updates-team@google.com The number of times an event on the Extended Updates opt-in dialog happened. Note that a user may open and close the dialog multiple times before finally opting in, so it's more useful to filter on unique clients. aluh@chromium.org vsavu@google.com chromeos-consumer-extended-updates-team@google.com The number of times an event related to the various entry points into the Extended Updates opt-in flow happened. These numbers only include owner users on unmanaged and opt-in required devices. Note that these events can happen multiple times for the same user, so it's more useful to filter on unique clients. vincentchiang@google.com zoraiznaeem@google.com cros-sw-perf@google.com Whether the Startup.FirstWebContents.* metrics were recorded for the first active web browser window in a ChromeOS session. Recorded once per ChromeOS session in which a browser window is restored. An example where this is false: When the post-login feature is enabled and the user has selected "Ask every time" for restoring their session, an overview mode window is active on startup rather than a browser window, so Startup.FirstWebContents metrics are skipped. xdai@chromium.org chromeos-wm@google.com The number of floating windows per session, which is from the time a user logs in to the time they log off. This counts how many times any window enters float state. If the same window is floated twice in the same session, it will get recorded twice. xdai@chromium.org chromeos-wm@chromium.org The amount of time a user keeps a floating window open and visible. Open and visible means the window is in float state and is on the active desk. If a window is floated and moved to an inactive desk we stop recording. The timer starts when we float a window and we record the histogram when the window is unfloated. The recording can also happen if a floated window is moved to an inactive desk, or the desk changes; we treat this as unfloated. xdai@chromium.org chromeos-wm@chromium.org The counts of how many times floated windows moved to another desk per session, which is from the time a user logs in to the time they log off. xdai@chromium.org chromeos-wm@chromium.org Recorded whatever action is taken on the {TabletOrClamshellMode} multitask menu. xdai@chromium.org chromeos-wm@chromium.org Recorded whenever the multitask menu is opened from {TabletOrClamshellMode}. The recorded enum value indicates the method used to open the menu. andreydav@google.com slutskii@google.com Recorded when floating workspace service V2 is launched. The false bucket is unused here. Warning: this histogram was expired from 2024-08-23 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Record if Floating Workspace startup UI was closed manually or automatically (once the template was restored). andreydav@google.com slutskii@google.com Recorded the reason for template launch failures. Warning: this histogram was expired from 2024-02-08 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Indicate the time to download and launch a floating workspace template. Warning: this histogram was expired from 2024-02-08 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Recorded when floating workspace service V2 is initialized, but no floating workspace template was found. The false bucket is unused here. Warning: this histogram was expired from 2024-08-23 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Record the size of an uploaded floating workspace template. Warning: this histogram was expired from 2024-02-08 to 2025-05-23; data may be missing. andreydav@google.com slutskii@google.com Record the floating workspace template upload status. Warning: this histogram was expired from 2024-02-08 to 2025-05-23; data may be missing. richui@chromium.org skau@chromium.org chromeos-wm@google.com Recorded API latency of the requests sent by Focus Mode. The recorded value indicates the time to receive the response. richui@chromium.org skau@chromium.org chromeos-wm@google.com Recorded API result of the requests sent by Focus Mode. The recorded value indicates whether the request succeeds with retry. richui@chromium.org skau@chromium.org chromeos-wm@google.com Recorded API result of the requests sent by Focus Mode. The recorded value indicates whether the request succeeds with retry. richui@chromium.org skau@chromium.org chromeos-wm@google.com Recorded API status of the requests sent by Focus Mode. The recorded enum value indicates the HTTP status code of response. hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Records interactions with Do Not Disturb during a Focus Mode session. Recorded once per session. Indicates the final state of Do Not Disturb and if a user changed the state during the session. hongyulong@chromium.org richui@chromium.org chromeos-wm@google.com Recorded whenever a focus session will be ended through the focus panel, the contextual panel, or the feature pod. hongyulong@chromium.org richui@chromium.org chromeos-wm@google.com Record the reason for the ending moment bubble closed. richui@chromium.org skau@chromium.org hongyulong@chromium.org chromeos-wm@google.com When a session ends, record how many times the user paused the playlists which were played by the Focus Mode during the session. richui@chromium.org skau@chromium.org hongyulong@chromium.org chromeos-wm@google.com Records the percent of the session which was completed (bucketed by the final session duration) when a session is over. This is for the {SessionDurationType} type of `Short` (< 11 mins), `Medium` (11 - 29 mins), and `Long` (> 29 mins). hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Records the playlist which starts playing during a session. richui@chromium.org skau@chromium.org hongyulong@chromium.org chromeos-wm@google.com When a session ends, record how many playlists were played during the session. hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Records the type of playlists played during a session when a session ends. hongyulong@chromium.org richui@chromium.org chromeos-wm@google.com Record the time in minutes since the session started when the session ends. hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Records how many milliseconds the user waited for a soundscape playlist to be played from clicking on the playlist while in a focus session or starting a session to play the current selected playlist. hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Emits true when an existing media session is playing on the system on session start; otherwise, emits false. hongyulong@chromium.org richui@chromium.org chromeos-wm@google.com Records a session duration in minutes when starting a focus session. hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Record the state of the selected task when a focus mode session is started. hongyulong@chromium.org richui@chromium.org chromeos-wm@google.com Recorded whenever a focus session will be started through the focus panel or the feature pod. richui@chromium.org skau@chromium.org hongyulong@chromium.org chromeos-wm@google.com When a session ends, record how many tasks were marked as completed by the user during the session. hongyulong@chromium.org richui@chromium.org chromeos-wm@google.com Record the count of tasks selected throughout each focus session. Emitted when a session ends. Note that only one task can be selected at a time. richui@chromium.org skau@chromium.org hongyulong@chromium.org chromeos-wm@google.com Records the number of minutes that were added to a session (bucketed by the initial session duration) when a session is over. This is for the {TimeAddedType} type of `Short` (< 11 mins), `Medium` (11 - 29 mins), and `Long` (> 29 mins). hongyulong@chromium.org richui@chromium.org skau@chromium.org chromeos-wm@google.com Records how many milliseconds the user waited for a YouTube Music playlist to be played from clicking on the playlist while in a focus session or starting a session to play the current selected playlist. vincentchiang@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com This is the same latency as PageLoad.InteractiveTiming.FirstInputDelay4 except it's recorded once per user session for the active browser window's foreground tab in a session restore (either a full ChromeOS-level session restore or a Chrome-specific restore). If a browser window that's not from a full session restore is active (ex: user opened manually), this metric is skipped. xdai@chromium.org chromeos-wm@google.com Emmited every time the informed restore dialog shows up. phshah@chromium.org arc-gaming@google.com Records whether the game controls feature is toggled on or off. phshah@chromium.org arc-gaming@google.com Records where the game controls hint is toggled {OnOrOff}. phshah@chromium.org arc-gaming@google.com Records how often a specific function within the game dashboard is triggered. phshah@chromium.org arc-gaming@google.com Records where the recording starts from, main menu or toolbar. phshah@chromium.org arc-gaming@google.com Records where the screenshot is taken from, main menu or toolbar. phshah@chromium.org arc-gaming@google.com Records the ways of the game dashboard main menu is toggled {OnOrOff}. phshah@chromium.org arc-gaming@google.com Records whether the tool bar is toggled to expanded or collapsed. phshah@chromium.org arc-gaming@google.com Records where the toolbar is repositioned. phshah@chromium.org arc-gaming@google.com Records whether the tool bar is toggled on or off. phshah@chromium.org arc-gaming@google.com Records whether the welcome notification is toggled on or off. dmblack@google.com xiaohuic@chromium.org Records visits to Gemini app related pages. Emitted when the browser tab performing the visit has started navigation to the recorded page. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API. The recorded value indicates the number of course work items fetched for a course, where the current user is enrolled as a student. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API. The recorded value indicates whether the current user is enrolled in at least one classroom course. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API. The recorded value indicates the total number of active courses returned for the user. This number serves as a multiplier for futher requests to get course work items and student submissions. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API. The recorded value indicates the time needed to fetch all student data (courses, course work, student submissions). amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API. The recorded value indicates the number of student submissions fetched for a course, where the current user is enrolled as a student. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Tasks API. The recorded value indicates the number of tasks in a task list after processing (only not completed root tasks). amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Tasks API. The recorded value indicates the number of fetched raw tasks in a task list. Raw - means all individual tasks before processing, including all subtasks, since the API returns them as a flat array. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI submits changes to Google Tasks API after closing the bubble. The recorded value indicates the number of completed tasks that require individiual requests to update their status. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Tasks API. The recorded value indicates the number of task lists fetched for the current user. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API or Tasks API. The recorded value indicates the duration of the fetch request/response. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API or Tasks API. The recorded value indicates the total number of pages needed to fetch in order to get all data. amitrokhin@google.com chromeos-launcher@google.com Recorded whenever glanceables UI fetches data from Google Classroom API or Tasks API. The recorded enum value indicates the HTTP status code of the fetch response. mmourgos@google.com chromeos-launcher@google.com The amount of time that the user had the student assignment list selected and shown. This metric is split between the default list which is shown when the bubble is first opened and assignment lists which are shown after chaning the selection. The time is measured from the moment that the list is shown to the moment that either the selection is changed or the bubble is closed. mmourgos@google.com chromeos-launcher@google.com The number of times that the assignment list has been selected. Recorded every time a new assignment list is selected. mmourgos@google.com chromeos-launcher@google.com The total number of times that a new student assignment list is selected. The total count is recorded when the glanceable bubble is closed. tbarzic@google.com chromeos-launcher@google.com User actions performed in the Time Management Glanceables bubble for Google Classroom amitrokhin@google.com tbarzic@google.com chromeos-launcher@google.com Whether time management glanceables are enabled, and the reason they are enabled. Recorded when the feature state gets evaluated - either when an eligible user profile gets created, or glanceables policy changes. anasalazar@google.com chromeos-launcher@google.com The amount of time that the user spent between login and opening the glanceables time management bubble. The time is measured from the moment the user logs in and the time the glanceables bubble is created. amitrokhin@google.com tbarzic@google.com chromeos-launcher@google.com Records the number of times the user created a task in the in-line task creation UI while a task list was selected in the tasks time management glanceable bubble. The histogram is recorded when the time management glanceables bubble gets closed, or the user changes the selected task list. The count of added tasks is reset at the same time. The histogram is recorded separately depending on whether the selected task list was initially empty. amitrokhin@google.com tbarzic@google.com chromeos-launcher@google.com Records the number of times the user created a task in the in-line task creation UI while a task list was selected in the tasks time management glanceable bubble. The histogram is recorded only if the user is considered a potentially new tasks user (they have a single empty task list in Google Tasks). It's recorded when the glanceables bubble gets closed. amitrokhin@google.com tbarzic@google.com chromeos-launcher@google.com The result of use interaction with the tasks glanceables UI to add a new task. When the user clicks "Add new task" button, the tasks glanceables UI displays a textfield to enter a new task title. This metric records whether the user entered the task title, initiating an API call to create a task, or whether they dismissed it while it was empty. wcwang@google.com chromeos-launcher@google.com The animation smoothness of the resize animation of the glanceables tasks bubble view. This occurs when a task is entering edit mode or an editted task is committed. amitrokhin@google.com tbarzic@google.com chromeos-launcher@google.com The result of use interaction with the tasks glanceables UI to modify a task. When the user clicks on a task title, the tasks glanceables UI displays a textfield that lets the user update the task title. This metric records whether the user changed the task title, initiating an API call to modify the task, or whether they dismissed it with no changes. mmourgos@google.com chromeos-launcher@google.com Records the total number of times the selected tasks list is changed. The total count is recorded when the glanceable bubble is closed. tbarzic@google.com chromeos-launcher@google.com User actions performed in the Time Management Glanceables bubble for Google Tasks amitrokhin@google.com chromeos-launcher@google.com Records the total number of tasks shown in the default (initially selected) task list. anasalazar@google.com chromeos-launcher@google.com The amount of time in ms that the glanceables bubble takes to load up the data from the API after the user triggered an update. Split by bubble type and query status. anasalazar@google.com chromeos-launcher@google.com The amount of time in ms that the glanceables bubble takes to load up the initial data from the API after opened. Split by bubble type and whether the time represent the first time the bubble was opened in the session or not. wcwang@google.com chromeos-launcher@google.com The animation smoothness of the expand/collapse animation of the glanceables bubble. This occurs when the expand state changes which is usually triggered by clicking the expand button on the glanceables bubble view. anasalazar@google.com chromeos-launcher@google.com The amount of time that the user kept the glanceables time management bubble open. The time is measured from the moment the glanceables bubble is created until said bubble is destroyed. Recorded when {GlanceableBubble} glanceables bubble is shown. anasalazar@google.com chromeos-launcher@google.com Tracks the animation smoothness for the ShelfWidget's animating background during transitions of the hotseat to shown, extended, and hidden hotseat states. Check Ash.HotseatWidgetAnimation.AnimationSmoothness for smoothness of the HotseatWidget. {HotseatTransitionType} Warning: this histogram was expired from 2023-09-06 to 2025-02-22; data may be missing. anasalazar@chromium.org newcomer@chromium.org Presentation time in ms of the hotseat when it changes between the hidden and the extended state as a result of a drag action. Recorded when the drag action is in progress. anasalazar@google.com chromeos-launcher@google.com Maximum latency of the presentation time in ms of the hotseat when it changes between the hidden and the extended state as a result of a drag action. Recorded when the drag action is finished. Warning: this histogram was expired from 2023-10-25 to 2025-02-22; data may be missing. anasalazar@chromium.org newcomer@chromium.org Tracks the animation smoothness for the bounds animation of the hotseat widget's elements during transitions of the hotseat to shown, extended, and hidden hotseat states. Check Ash.HotseatTransition.AnimationSmoothness for smoothness of the shelf's animating background. {HotseatTransitionType} anasalazar@chromium.org newcomer@chromium.org Tracks the animation smoothness for the bounds animation of the hotseat widget's elements during transitions of the hotseat to shown, extended, and hidden hotseat states. Check Ash.HotseatTransition.AnimationSmoothness for smoothness of the shelf's animating background. {HotseatWidgetElement} oshima@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com Time between when the size of a window changes during an interactive window resize and the results are drawn (presented) on screen. This is recorded for each movement of the mouse/pointer that results in a resize. oshima@chromium.org zoraiznaeem@chromium.org cros-sw-perf@google.com Maximum time between when the size of a window changes during an interactive window resize and the results are drawn (presented) on screen. This is recorded for each movement of the mouse/pointer that results in a resize. miersh@google.com olsa@google.com Tracks events related the migration of PKCS#12 certs from the NSS public slot into the private slot provided by Chaps. hdchuong@google.com essential-inputs-team@google.com The histogram captures user interactions with Lobster feature, providing a funnel view from the beginning to end of the user journey. This metric is recorded at different times, depending on the event being recorded. For example, consent screen impression event is recorded at the time when the consent screen is shown to the user. hidehiko@chromium.org junis@google.com cros-sw-perf@google.com Time between primary user logged in (i.e. a successful cryptohome mount) and ARC boot completion.. emaamari@google.com cros-lurs@google.com The count of auth method switching actions on ChromeOS lock screen. Warning: this histogram was expired from 2025-08-31 to 2025-11-25; data may be missing. emaamari@google.com cros-lurs@google.com The usage of different auth methods (PIN / Password / Smartlock / Fingerprint / Challenge response) on Chromebooks in clamshell mode and on other form-factors. emaamari@google.com cros-lurs@google.com The usage of different auth methods (PIN / Password / Smartlock / Fingerprint / Challenge response) on Chromebooks in tablet mode. Warning: this histogram was expired from 2025-08-31 to 2025-11-25; data may be missing. mslus@google.com cros-lurs@google.com Records all session lock and unlock events. emaamari@google.com cros-lurs@google.com The numbers of times that users click on the shelf buttons, trays and lock screen note on the ChromeOS lock screen. Warning: this histogram was expired from 2026-01-04 to 2026-03-19; data may be missing. hidehiko@chromium.org junis@google.com cros-sw-perf@google.com Time from the OnAuthSuccess Chrome OS cryptohome login event and LoggedInStateChanged event. emaamari@google.com cros-lurs@google.com The count of auth method switching actions on ChromeOS login screen. Warning: this histogram was expired from 2024-01-14 to 2024-04-24; data may be missing. emaamari@google.com cros-lurs@google.com The usage of different auth methods (PIN / Password / Smartlock / Fingerprint / Challenge response) on Chromebooks in clamshell mode and on other form-factors. Warning: this histogram was expired from 2025-06-29 to 2025-11-25; data may be missing. emaamari@google.com cros-lurs@google.com The usage of different auth methods (PIN / Password / Smartlock / Fingerprint / Challenge response) on Chromebooks in tablet mode. emaamari@google.com cros-lurs@google.com Whether the cryptohome migration banner was shown on the Chrome OS login screen. Warning: this histogram was expired from 2024-02-04 to 2024-04-24; data may be missing. Warning: this histogram was expired from 2025-10-24 to 2025-11-25; data may be missing. emaamari@google.com cros-lurs@google.com The numbers of times that users click on the shelf buttons and trays on the ChromeOS login screen. Warning: this histogram was expired from 2025-06-29 to 2025-11-25; data may be missing. emaamari@google.com cros-lurs@google.com What shelf buttons or trays are clicked in the OOBE. emaamari@google.com rrsilva@google.com cros-lurs@google.com The result of the PIN auto submit 'Backfill' operation. Users updating to M86 with an existing PIN will have their preference regarding auto submit 'backfilled' to either enabled or disabled. longbowei@google.com zhangwenyu@google.com cros-families-eng@google.com Records instances of a "PERMANENTLY_UNTRUSTED" result during the check for trusted values before showing gaia signin. This is a fatal result which will result in signin not being shown. longbowei@google.com zhangwenyu@google.com cros-families-eng@google.com Records the amount of time spent waiting for trusted values before showing gaia signin. Waiting for trusted values ensures that the device owner id is present before showing the signin, which is necessary for checking signin permissions for child users. This check may introduce a delay for all users. This metric allows monitoring that delay. hidehiko@chromium.org raging@google.com cros-lurs@google.com Total user first session time between when the user was added to the device and session exit or device shutdown. Reported for primary users only. hidehiko@chromium.org raging@google.com cros-lurs@google.com Total user session time between sign-in and session exit or device shutdown. Reported for primary users only. First sessions are excluded and reported in a separate histogram: Ash.Login.TotalFirstSessionDuration. oshima@chromium.org cros-sw-perf@google.com The duration of how long it took to finish all animations applied during the login process, from the time the first animation is added, to the time the last animation is finished. oshima@chromium.org cros-sw-perf@google.com Jank metrics of all animations applied during the login process. This represents how often the frame update rate changed during animation. {TabletOrClamshellMode} oshima@chromium.org cros-sw-perf@google.com Relative smoothness of all animations applied during the login process. 100% represents the ideal smoothness for 60 frames per second. {TabletOrClamshellMode} hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Time between primary user logged in (i.e. a successful cryptohome mount) and creation of all expected restored browser windows. This metric is reported only if session is restored automatically. hidehiko@chromium.org junis@google.com cros-sw-perf@google.org The duration of how long it took for all pixels of expected restored windows to be rendered after primary user logged in (i.e. a successful cryptohome mount). This metric is reported only if session is restored automatically. hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Time between primary user logged in (i.e. a successful cryptohome mount) and the full manifestation of all expected restored browser windows. This metric is reported only if session restore is automatic. hidehiko@chromium.org junis@google.com zxdan@chromium.org cros-sw-perf@google.com Time from the moment sign in authentication is started until the post login animation finishes. (Chrome OS). Different UI flows can have longer expected times due to extra compositor animations. For this flow, {UIFlow}. hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Time between primary user logged in (i.e. a successful cryptohome mount) and the complete loading of all pinned button icons for restored windows. hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Time between primary user logged in (i.e. a successful cryptohome mount) and ARC boot completion.. hidehiko@chromium.org junis@google.com cros-sw-perf@google.org The duration between primary user is logged in and when deferred task runner is triggered. hidehiko@chromium.org junis@google.com cros-sw-perf@google.org The duration of how long it took to finish all animations applied during the login process, from the time the first animation is added, to the time the last animation is finished. {TabletOrClamshellMode} hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Jank metrics of all animations applied during the login process. This represents how often the frame update rate changed during animation. {TabletOrClamshellMode} hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Relative smoothness of all animations applied during the login process. 100% represents the ideal smoothness for 60 frames per second. {TabletOrClamshellMode} hidehiko@chromium.org junis@google.com cros-sw-perf@google.org The duration of how long it took to load all the shelf icons of restored windows after primary user logged in (i.e. a successful cryptohome mount). hidehiko@chromium.org junis@google.com cros-sw-perf@google.org Time between when sign-in authentication is started and when post login animation finishes. This metric corresponds to BootTime.Login2. hidehiko@chromium.org junis@google.com cros-sw-perf@google.com Records the result of the readahead request for CrOS login. Failure means readahead failed for some files. Succeeded means all expected files will be prefetched. Canceled means readahead is canceled because the session is started while readahead is ongoing. newcomer@google.com cros-status-area-eng@google.com Tracks the actions in the magic boost disclaimer view, which is triggered by the {OptInFeatures}. Recorded when the magic boost disclaimer view is shown or any button in the view is clicked. newcomer@chromium.org cros-status-area-eng@google.com Recorded when any button in the web Mahi Penel widget is activated. newcomer@chromium.org cros-status-area-eng@google.com Record the time it takes to load the elucidation inside the Mahi panel. Emitted when elucidation text is fully loaded and shows up. newcomer@chromium.org cros-status-area-eng@google.com Record the type of feedback that a user has for the Mahi feature. Emitted when users click the thumbs up or thumbs down button in the panel. newcomer@chromium.org cros-status-area-eng@google.com Record the time it takes to answer the question inside the Mahi panel. Emitted when an answer text is fully loaded and shows up. andrewxu@chromium.org cros-status-area-eng@google.com Record the count of questions in each Mahi session. Emitted when a Mahi session ends, including: 1. Content is refreshed. 2. Mahi UI is closed. andrewxu@chromium.org cros-status-area-eng@google.com Record the sources of questions sent to the Mahi backend. Emitted when a question is posted. newcomer@chromium.org cros-status-area-eng@google.com Record the time it takes to load the summary inside the Mahi panel. Emitted when summary text is fully loaded and shows up. kradtke@chromium.org cros-status-area-eng@google.com Records the times the Mahi panel was opened in a session. The metric is emitted once per session when the session is no longer active, either through a session state change or on shutdown. newcomer@chromium.org cros-status-area-eng@google.com Records time user spent in Mahi Panel. Starts measuring time whenever the MahiPanelView is constructed, and records metric when the view is destroyed. amoylan@chromium.org cros-manta-team@google.com Record the status code of {MantaMetricType} requests. amoylan@chromium.org cros-manta-team@google.com Record the time cost of successful {MantaMetricType} requests. newcomer@chromium.org cros-status-area-eng@google.com Presentation time while scrolling through the list of notifications in Notification Center. Emitted when Notification Center is scrolled. newcomer@chromium.org cros-status-area-eng@google.com Presentation time while scrolling through the list of notifications in Notification Center. Emitted when Notification Center is scrolled. minch@chromium.org yunchengs@google.com chromeos-wm@google.com After a display rotation, the existing app windows will get remapped. A one minute timer then runs. If any of the app windows are moved or resized by the user, then this histogram records true. If the timer ends without an app window being moved or resized, then this histogram records false. Used to determine if the user is satisfied with the window manager auto remap. minch@chromium.org yunchengs@google.com chromeos-wm@google.com After a display work area change, the existing app windows will get remapped. A one minute timer then runs. If any of the app windows are moved or resized by the user, then this histogram records true. If the timer ends without an app window being moved or resized, then this histogram records false. Used to determine if the user is satisfied with the window manager auto remap. anasalazar@google.com chromeos-launcher@google.com Relative smoothness of animations of the navigation widget's elements, which are the widget itself and its child views. 100% represents ideally smooth 60 frames per second. 50% represents only 30 frames per second is achieved during the animations. Recorded every time an animation is triggered in the Navigation Widget. We record this metric for each element separately. {HotseatTransitionType} anasalazar@google.com chromeos-launcher@google.com Relative smoothness of animations of the navigation widget's elements, which are the widget itself and its child views. 100% represents ideally smooth 60 frames per second. 50% represents only 30 frames per second is achieved during the animations. Recorded every time an animation is triggered in the Navigation Widget. We record this metric for each element separately. {NavigationWidgetElement} longbowei@google.com cros-device-enablement@google.com Emitted when the Auto Night Light notification is shown. Warning: this histogram was expired from 2022-01-30 to 2025-04-08; data may be missing. longbowei@google.com cros-device-enablement@google.com Emitted when the user interacts with the Auto Night Light notification to report the state of the notification as a result of this interaction. Warning: this histogram was expired from 2023-07-02 to 2025-04-08; data may be missing. longbowei@google.com cros-device-enablement@google.com The selected Night Light schedule type. Emitted when the user changes the Night Light schedule type from the Display System Settings. Warning: this histogram was expired from 2024-05-19 to 2025-04-08; data may be missing. longbowei@google.com cros-device-enablement@google.com The selected Night Light schedule type. Emitted on login. cambickel@google.com cros-device-enablement@google.com The ranges in which the selected values of the Night Light color temperature reside. Emitted when the user drags the Night Light color temperature slider to change its value from the Display System Settings. Warning: this histogram was expired from 2022-02-01 to 2025-04-08; data may be missing. cambickel@google.com cros-device-enablement@google.com The current Night Light color temperature. Low temperatures are cooler, higher temperature are warmer. Emitted on login. newcomer@chromium.org cros-status-area-eng@google.com Animation smoothness of the "clear all" animation in the CrOS message center. This occurs when the clear all button is pressed with notifications that are not visible on screen. Measured via a throughtput tracker. newcomer@chromium.org cros-status-area-eng@google.com Animation smoothness of the "clear all" animation in the CrOS message center. This occurs when the clear all button is pressed and all notifications are visible. Measured via a throughtput tracker. newcomer@chromium.org cros-status-area-eng@google.com The number of notification contained in one group. Emitted when a notification is added or removed from a group. newcomer@chromium.org cros-status-area-eng@google.com Animation smoothness of the "Expand or Collapse" animation in the CrOS message center. This occurs when the notification requests a size change due to being expanded or collapsed. Usually involves other layer animations which are named (get name from newcomer@). newcomer@chromium.org cros-status-area-eng@google.com Record the types of group notification added to the system. The types are group parent and group child. Emitted when a group notification is created. andrewxu@chromium.org cros-status-area-eng@google.com Record the memory size in KB of notification images on the 1.0 scale factor. Emitted when setting a notification's image. newcomer@chromium.org cros-status-area-eng@google.com Animation smoothness of the "move down" animation in the CrOS message center. This occurs when a notification is removed and notifications above the deleted one animate downwards to fill in the space. Measured via a throughtput tracker. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade in animation of the settings button inside a swipe control notification view. 100% represents ideally smooth 60 frames per second. Emitted when the fade in animation is completed. amehfooz@chromium.org tbarzic@chromium.org cros-status-area-eng@google.com Relative smoothness of animations of notification pop-up. 100% represents ideally smooth 60 frames per second. Emitted when pop-up animations are completed, including pop-up fade-in, fade-out, move-up, move-down. newcomer@chromium.org cros-status-area-eng@google.com Records the number of popups that show up on top of a UI surface. Emitted when the UI surface is shown or changes height when popup notifications are visible, and when there's a new notification popup added when the UI surface is visible. newcomer@chromium.org cros-status-area-eng@google.com Records the type of UI surface that popup notifications are shown on top of. Emitted when the UI surface is shown or changes height when popup notifications are visible, and when there's a new notification popup added when the UI surface is visible. andrewxu@chromium.org cros-status-area-eng@google.com Record the memory size in KB of notification source images on the 1.0 scale factor. Emitted when applying an image to a notification built from a notification resource. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the {Animation} in notification view when converting from single to group notification. 100% represents ideally smooth 60 frames per second. Emitted when the animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the bounds change animation of the expand button inside a notification view. 100% represents ideally smooth 60 frames per second. Emitted when the animation is completed. newcomer@chromium.org cros-status-area-eng@google.com The count of actions that is performed after an expand button is clicked. The actions are expanding or collapsing individual or group notification. Emitted when an expand button is clicked. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the {Animation} inside the expand button of the notification view when converting from single to group notification. 100% represents ideally smooth 60 frames per second. Emitted when the animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the scale down animation of image container view inside a notification view. 100% represents ideally smooth 60 frames per second. Emitted when the scale down animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Records the types of notification view added to the system. Emitted when each notification is added and the notification is visible. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade in animation of {ChildView} inside a notification view. 100% represents ideally smooth 60 frames per second. Emitted when the fade in animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade out animation of {ChildView} inside a notification view. 100% represents ideally smooth 60 frames per second. Emitted when the fade out animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the scale and translate animation of {ChildView} inside a notification view. 100% represents ideally smooth 60 frames per second. Emitted when the animation is completed. kradtke@chromium.org cros-status-area-eng@google.com Tracks the number of times a specific nudge is shown to users. This metric is recorded every time a nudge is shown. kradtke@google.com cros-status-area-eng@google.com Tracks the time from when a specific educational nudge is shown to when it's interacted with. Starts measuring time when the nudge is shown and records the Nudge catalog name in one of the `TimeRange` buckets if the user performs the nudge's suggested action. These buckets are all exclusive. kradtke@google.com cros-status-area-eng@google.com Records the nudge catalog name when a user presses one of the nudge's buttons. kradtke@google.com cros-status-area-eng@google.com Records a `catalog_name` whenever a pinned notification is shown without having provided a `vector_small_image` through its `Notification` object. All pinned notifications must have an icon, so the metric will be used to track misbehaving notifications. kradtke@google.com cros-status-area-eng@google.com Records a `catalog_name` whenever a pinned notification is shown without having provided a `title` through its `Notification` object. All pinned notifications must have a title, so the metric will be used to track misbehaving notifications. kradtke@google.com cros-status-area-eng@google.com Tracks the time a specific toast spends on screen before being dismissed by the user or system. Records the toast catalog name in one of the time buckets available when toast is dismissed either manually or by time out. kradtke@chromium.org cros-status-area-eng@google.com Tracks the number of times a specific toast is shown to users. This metric is recorded every time a toast is shown. kradtke@chromium.org cros-status-area-eng@google.com Records the time a toast spends in queue before it's shown on screen. kradtke@google.com cros-status-area-eng@google.com Tracks the number of times a specific system notification is added to the notification list. This metric is recorded every time the `OnNotificationAdded` event is triggered for a system notification. kradtke@google.com cros-status-area-eng@google.com Tracks action button presses on system notifications. Records the notification catalog name in one of the button index buckets. kradtke@google.com cros-status-area-eng@google.com Tracks the time a specific system notification spends as a pop-up before being dismissed either by the user or system. Records the notification catalog name in one of the time buckets available when the pop-up is dismissed either manually or by time out. kradtke@google.com cros-status-area-eng@google.com Tracks the number of times a specific system notification pop-up is shown to users. kradtke@google.com cros-status-area-eng@google.com Records the time a system notification spends as a pop-up before being dismissed either by the user or system. Starts measuring time whenever the pop-up is shown to the user, and records metric when the pop-up is dismissed either manually or by time out. antrim@chromium.org cros-lurs@google.com The result of {AuthFactorMigrationName} migration. Reported on each login after the migrations are run. Warning: this histogram was expired from 2025-09-07 to 2025-11-25; data may be missing. antrim@chromium.org cros-lurs@google.com Whether the logged in user has {AuthFactor} auth factor configured. Recorded upon successful login. antrim@chromium.org cros-lurs@google.com Time spent during particular stages of login process. Recorded upon successful login. Warning: this histogram was expired from 2025-02-01 to 2025-11-25; data may be missing. iscsi@google.com cros-lurs@google.com Whether the logged-in user does not have a password. Recorded upon successful login. emaamari@google.com cros-lurs@google.com The number of incorrect passwords entered in Chrome OS {AuthenticationSurface} screen until the "{AuthenticationOutcome}" outcome. For previous data (grouped for login and lock screen together) see "Ash.Login.Lock.NbPasswordAttempts.*". Warning: this histogram was expired from 2026-01-11 to 2026-03-19; data may be missing. oshima@chromium.org chromeos-wm@google.com Relative smoothness of animations when closing a window, recorded when the animation completes. 100% represents ideally smooth 60 frames per second. {TabletOrClamshellMode} achuith@chromium.org cros-sw-perf@google.com Relative smoothness of animations when entering overview mode, recorded when the animation completes. 100% represents ideally smooth 60 frames per second. {OverviewAnimationMode} achuith@chromium.org cros-sw-perf@google.com Relative smoothness of animations when exiting overview mode, recorded when the animation completes. 100% represents ideally smooth 60 frames per second. {OverviewAnimationMode}. Warning: this histogram was expired from 2024-02-07 to 2024-07-25; data may be missing. xdai@chromium.org chromeos-wm@chromium.org The number of times the arrow keys are pressed in overview mode per session, i.e. between bringing up overview mode and ending it. This is only measured for the sessions that end by selecting a window with the enter key. Warning: this histogram was expired from 2025-06-21 to 2025-07-21; data may be missing. esum@google.com chromeos-wm@google.com Records the presentation time, which is the time in milliseconds it takes from when the enter-overview animation has finished/the desk bar is opened to when the next frame is shown to the user. Note this metric is only recorded in cases where the desk bar is opened after the enter-overview animation completes; it's not recorded in overview sessions where the desk bar opens immediately at the beginning of the session. In the latter case, the time to open the desk bar is incorporated into Ash.Overview.Enter.PresentationTime. zoraiznaeem@chromium.org cros-sw-perf@google.com Records the amount of time it takes to initialize the desk bar widget when entering overview mode. Recorded each time overview mode is entered. zoraiznaeem@chromium.org cros-sw-perf@google.com Tracks whether the desk bar was opened during an overview mode session, and if so, when it was opened (within or after the first frame). Recorded once per overview session. zoraiznaeem@chromium.org cros-sw-perf@google.com The number of desks open when entering overview mode. Recorded each time overview mode is entered. This does not take into account the user creating new desks while in overview mode afterwards. minch@chromium.org cros-sw-perf@google.com Emitted when exiting overview mode. Recording the reasons for ending overview mode. E.g, pressing the overview button at status area. Note: M130 has a fix. When exiting overview mode for the "informed restore" dialog after login (prompting the user whether they want to restore windows from the previous session), this was being logged as "Pressing shortcut F5". This has been fixed to be logged under ""After user login, close dialog ...". xdai@chromium.org zxdan@chromium.org esum@google.com cros-sw-perf@google.com Records the presentation time, which is the time in milliseconds it takes from when the overview enter event was received and successfully processed to when the next frame is shown to the user. This is segmented by different broad reasons overview mode was started. Each reason has a different profile and performance characteristics and hence, should be analyzed separately. xdai@chromium.org zxdan@chromium.org esum@google.com chromeos-wm@google.com Records the presentation time, which is the time in milliseconds it takes from when the overview exit event was received and successfully processed to when the next frame is shown to the user. xdai@chromium.org chromeos-wm@google.com The number of items (single windows or groups of windows such as panels) in the overview mode, present at the start of each session. xdai@chromium.org chromeos-wm@google.com The ratio between the arrow key presses and the number of overview items, expressed as a percentage for a single session. Recorded when an overview session is exited after selecting a highlighted overview item. xdai@chromium.org chromeos-wm@google.com The number of items closed from the window overview for a single session. Recorded when exiting an overview session. tclaiborne@chromium.org xdai@chromium.org Maximum latency of the presentation time for scrolling the overview grid in overview mode for a scrolling session. tclaiborne@chromium.org xdai@chromium.org Presentation time for scrolling the overview grid in overview mode. Each time the grid is updated by a scroll, the time it takes to update the new visuals onto the screen is updated. xdai@chromium.org chromeos-wm@google.com When a window is selected in overview mode, records that window's position in the global MRU ordering. 1 represents the most-recently used window, 2 represents the next most-recently used window, and so on. minch@chromium.org chromeos-wm@google.com Emitted when entering overview mode. Recording the reasons for starting overview mode. E.g, pressing the overview button at status area. Note: M130 has a fix. When overview mode was started for the "informed restore" dialog after login (prompting the user whether they want to restore windows from the previous session), this was being logged as "Pressing shortcut F5". This has been fixed to be logged under ""After user login, if full restore...". xdai@chromium.org chromeos-wm@google.com The amount of time between endings of overview mode sessions which were caused by the user selecting a window which was not previously active. Only recorded on the second and later times after startup that the user selected a window which was not previously active. xdai@chromium.org chromeos-wm@google.com The amount of time between uses of overview mode, recorded when overview mode is entered. Only recorded on the second and later times after startup that the user entered overview mode. xdai@chromium.org chromeos-wm@google.com The amount of time spent in overview mode. Overview mode is engaged by pressing the overview accelerator, overview button tray or swiping up from the shelf in tablet mode. The time is measured from the moment the windows begin animating to a thumbnail size preview to when a window is selected or selection is canceled. Recorded when an overview session is exited, before the exit animation starts. xdai@chromium.org chromeos-wm@google.com Maximum latency of the presentation time for dragging a window in overview mode. {TabletOrClamshellMode} Warning: this histogram was expired from 2025-04-11 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Presentation time for dragging a window in overview mode. {TabletOrClamshellMode} Warning: this histogram was expired from 2025-04-11 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Recorded when a drag from overview (not from the top or shelf) is completed, and when an overview item is closed by vertically swiping or flinging (even if you fling without dragging). jimmyxgong@chromium.org jthies@chromium.org cros-device-enablement@google.com The connectivity results of when the user plugs in a Thunderbolt/USB4 peripheral to their Chrome OS device. This is recorded for only devices that support Thunderbolt/USB4 connectivity. Gets recorded every time a Thunderbolt/USB4 peripheral is plugged in. This histogram is based off of the obsolete Ash.PciePeripheral.ConnectivityResults histogram and also includes invalid cable detection from the Chrome OS type-c daemon. Warning: this histogram was expired from 2022-12-31 to 2023-08-21; data may be missing. Warning: this histogram was expired from 2024-04-27 to 2024-11-12; data may be missing. cowmoo@google.com cros-p13n-eng@google.com Emitted when a request to load ambient mode google photos albums preview images completes, but only upon first page load. This roughly corresponds to user perceived time it takes to load the ambient preview section of Personalization App. Does not emit if a user opens Personalization App onto a page that does not load google photos albums previews. Does not emit unless the user already has ambient mode enabled and Google Photos selected as the source upon first opening Personalization App. cowmoo@google.com cros-p13n-eng@google.com Emitted whenever the user clicks the hyperlink to config Google Photos from the ambient UI albums selection subpage. cowmoo@google.com cros-p13n-eng@google.com Emitted when a user navigates to the ambient mode albums selection page in the Personalization Hub. Record the type of albums the user visits. jasontt@chromium.org cros-p13n-eng@google.com Emitted when a user selects an animation theme in screensaver subpage or when screensaver is first enabled. In the latter case, the theme is recorded here even without the user explicitly selecting it in the screensaver subpage. The theme in this case will either be the default chosen by the system, or the theme that the user had selected when they last disabled screensaver. jasontt@chromium.org cros-p13n-eng@google.com Emitted when a user presses the `Turn on` button on ambient preview to enable screen saver. cowmoo@google.com cros-p13n-eng@google.com Emitted when a user selects a new screen saver duration option. jasontt@chromium.org cros-p13n-eng@google.com Emitted when a user selects the video theme, selects a new video in the screensaver subpage, or enables screensaver with a video theme automatically active. The latter can happen if a video theme is the default on that particular device model, or if the user had selected a video theme in the past when they last disabled screensaver. cowmoo@google.com cros-p13n-eng@google.com Records the color scheme that the user has settled on. Emitted once for every UMA upload. cowmoo@google.com cros-p13n-eng@google.com Records the static color that the user has settled on. Emitted once for every UMA upload. jasontt@chromium.org cros-p13n-eng@google.com Emitted when a user selects a keyboard backlight color in personalization hub. thuongphan@chromium.org cros-p13n-eng@google.com Records the display type of keyboard backlight color that the user has settled on. Emitted once for every UMA upload. thuongphan@chromium.org cros-p13n-eng@google.com Emitted every time the user selects 'Customize' button to open zone customization dialog to view or set zone colors, even when no zone color changed. thuongphan@chromium.org cros-p13n-eng@google.com Records the keyboard backlight color for zone {ZoneIdx} that the user has settled on. Emitted once for every UMA upload if the user currently uses customized zone colors for keyboard backlight. jasontt@chromium.org cros-p13n-eng@google.com Emitted when a user navigates to a valid path in personalization hub. jasontt@chromium.org cros-p13n-eng@google.com Emitted when a user selects a theme button in personalization hub. xdai@chromium.org zxdan@chromium.org chromeos-wm@google.com Records the presentation time, which is the time in milliseconds it takes from when show phantom window was received and successfully processed to when the next frame is shown to the user. The phantom window is shown to give users an indication of the window bounds of the next state. For example, when dragging a window to the left side of the display, the phantom window will take up roughly the left half of the work area to indicate the bounds of the window, if the drag is completed. shend@chromium.org jopalmer@chromium.org essential-inputs-team@google.com The delay from when a search request was sent to the {Provider} provider, commonly when "start search" is called on the provider, to when the search results are received from the provider, commonly when the provider calls our provided callback for search results. If a request is cancelled before a search result is returned, this histogram is not recorded. shend@chromium.org jopalmer@chromium.org essential-inputs-team@google.com The delay from when the user triggered the picker to when the picker search field is focused for the first time. If the picker is triggered by an accelerator, the start time is calculated as the event timestamp of the accelerator. Recorded when the picker search field receives focus for the first time. shend@chromium.org essential-inputs-team@google.com The outcome of a Picker session to record how a user finished a session. Recorded when the Picker widget is destroyed. shend@chromium.org jopalmer@chromium.org essential-inputs-team@google.com The delay from when the search field content changes to when the next frame in the widget is presented to the screen. If multiple content changes result in the same frame being presented, the delay is calculated from the first content change. Recorded whenever the picker search field contents changes and a frame is successfully presented to the screen. shend@chromium.org jopalmer@chromium.org essential-inputs-team@google.com The delay from when the search results are updated to when the next frame in the widget is presented to the screen. If multiple content changes result in the same frame being presented, the delay is calculated from the first content change. Recorded whenever the picker publishes search results and a frame is successfully presented to the screen. shend@chromium.org jopalmer@chromium.org essential-inputs-team@google.com The delay from when the search field content changes to when the search results are received. If multiple content changes happen before search results are received, the time is calculated from the latest content change. Recorded whenever search results are received and there was a content change before that. shend@chromium.org michellegc@chromium.org essential-inputs-team@google.com The time it takes to download and decode the first frame of a GIF in Picker. Recorded starting at when the download request is issued, ending at when a ImageView is set with the first frame (of either a preview thumbnail or the full GIF). minch@chromium.org chromeos-wm@google.com Emitted whenever the informed restore dialog closes. Warning: this histogram was expired from 2025-04-05 to 2025-07-21; data may be missing. minch@chromium.org chromeos-wm@google.com Emits true if the informed restore dialog is shown with a shutdown screenshot inside. Emits false if the informed restore dialog is shown with the app lists view inside. xdai@chromium.org chromeos-wm@google.com The action taken by the user when the onboarding dialog is shown and the user had Restore off. Emits true if the user accepted the dialog and turned Restore to 'Ask every time', false otherwise. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com The amount of time it took to fetch the shutdown screenshot from the disk and decode it. minch@chromium.org chromeos-wm@google.com The amount of time it took to encode and save the screenshot to the disk that we captured on shutdown. Warning: this histogram was expired from 2025-04-05 to 2025-07-21; data may be missing. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com Recorded the status on taking the screenshot on shutdown. The recorded enum indicates it succeededs or failed with specific reason. minch@chromium.org chromeos-wm@google.com The amount of time it took to capture a screenshot of the active desk on shutdown. This screenshot will only be taken if there are windows opened in the desk. Warning: this histogram was expired from 2025-04-05 to 2025-07-21; data may be missing. minch@chromium.org zxdan@chromium.org chromeos-wm@google.com The amount of time in ms that user takes from when they see the pine contents view begin to fade in, to when they click the restore or cancel buttons. takise@chromium.org linben@chromium.org How long Android PIP was used for, upon ending the session. This metric was expired between April 2022 and July 2023 and may be missing data. takise@chromium.org linben@chromium.org Various individiual Picture-in-picture related events. See AshPipEvents. This metric was expired between April 2022 and July 2023 and may be missing data. jimmyxgong@chromium.org longbowei@google.com cros-device-enablement@google.com Record the outcome after a critical battery notification appears. jimmyxgong@chromium.org longbowei@google.com cros-device-enablement@google.com Record the time interval from when a critical battery notification appears to when an outcome such as plugging in, user-initiated shutdown, automatic shutdown due to low battery, suspension or crash occurs. jimmyxgong@chromium.org longbowei@google.com cros-device-enablement@google.com Record the remaining battery time when the status changes to critical and the corresponding notification is displayed. This metric is recorded only once per transition to critical state. jimmyxgong@chromium.org longbowei@google.com cros-device-enablement@google.com Record the remaining battery time when the device transitions from a critical state to charging state upon connecting the charger. Fires at the moment charger is connected. hongyulong@chromium.org chromeos-wm@google.com Record the battery level when a charger is connected and the battery status is from discharging to charging. hongyulong@chromium.org chromeos-wm@google.com Record the battery level when a charger is unplugged and the battery status is from charging to discharging. newcomer@chromium.org cros-status-area-eng@google.com Animation smoothness of the privacy indicators view animation. This occurs when an app is accessing camera/microphone or screen sharing and a green indicator appears on the status area button. Measured via a throughtput tracker. newcomer@chromium.org cros-status-area-eng@google.com Record the type of the app that change the status of camera/microphone access. Emitted when there is any change in the status of camera/microphone access. newcomer@chromium.org cros-status-area-eng@google.com Record the duration of showing for privacy indicators. Emitted when the privacy indicators view is hidden after a show in the status tray. newcomer@chromium.org cros-status-area-eng@google.com Record the type of the app that associate with the privacy indicators notification whose settings button is clicked. Emitted when the user click on the settings button of that notification. newcomer@chromium.org cros-status-area-eng@google.com Record the number of apps that access the camera at the same time. Emitted when there are one or more apps accessing the camera. newcomer@chromium.org cros-status-area-eng@google.com Record the number of apps that access the microphone at the same time. Emitted when there are one or more apps accessing the microphone. newcomer@chromium.org cros-status-area-eng@google.com Record the number of times that the tray indicator shows in the tray per session. Emitted when there is a change in user session. newcomer@chromium.org cros-status-area-eng@google.com Record the type of privacy indicators shown. Emitted when the privacy indicators view is shown in the status tray. newcomer@chromium.org cros-status-area-eng@google.com Record the source that use privacy indicators. Emitted when there's a client calling into the function that updates the privacy indicators. newcomer@chromium.org cros-status-area-eng@google.com Animation smoothness of the privacy indicators {Icon} fade in animation. This occurs when an app is accessing camera/microphone or screen sharing and a green indicator appears on the status area button. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Tracks how the user progresses through the creation flow in {TabletOrClamshellMode}, recorded each time the user starts or ends a screencast recording. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Tracks the most common errors during the screencast recording creation process in {TabletOrClamshellMode}, recorded each time an error occurs. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Recorded whenever the user chooses a marker color on the Projector toolbar in {TabletOrClamshellMode}. This metric records when the user changes the color or when the annotator toggles on, to record the saved last used color. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Records the fallback reason of using server based speech recognition instead of on device speech recogniton. This metric is recorded on server based speech recognition in projector session. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Tracks the processing time of batch pending screencast files validation on IO thread. Recorded each time when IO task finishes. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Tracks the interval between UI updates during screencast uploading. Recorded at each pending screencast's UI change except for the first one of current uploading phase. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com For a recognition session happening at {Location}, this histogram records the recognition status at the end of the session. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Recorded whenever the user opens, closes, or presses a button the Projector toolbar in {TabletOrClamshellMode}. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Tracks the number of transcripts generated during a recording in {TabletOrClamshellMode}, recorded each time the metadata file saved successfully after a recording ends. jiamingc@google.com cros-status-area-eng@google.com Recorded when any button in the quick settings view is activated. jiamingc@google.com cros-status-area-eng@google.com Recorded when an action is done on any FeaturePod in the quick settings view. {FeaturePodBehavior} can be a toggle to enable the feature, toggle to disable this feature, going to the feature's detailed page, or making the button visible. etuck@google.com cros-status-area-eng@google.com The number of quick settings pagination pages in the new quick settings UI. This metric is recorded each time the quick settings are closed. Note that this will also get recorded when the user opens and then closes the status area calendar (even if they never viewed the quick settings), until b/285280977 is fixed. jiamingc@google.com cros-status-area-eng@google.com Recorded when an action is done on any slider in the quick settings view or in the slider bubble. {SliderBehavior} can be changing the value or toggling to enable the feature. kradtke@chromium.org cros-status-area-eng@google.com Records time user spent in Quick Settings opened through the Status Area button. Starts measuring time whenever the QS bubble is opened, and records metric when the QS bubble is closed. jiamingc@google.com cros-status-area-eng@google.com The number of feature pods (e.g. WiFi, Bluetooth, IME, Accessibility, etc.) in the system tray quick settings when it is opened, including pods that overflow to other pages. This metric is logged by 2 different types of {DeviceMode}: "Clamshell" and "Tablet". junis@google.com hidehiko@chromium.org As part of the ash refactoring effort, we are going to replace ProfilePolicyConnector::IsManaged() with user_manager::User::is_managed() as much as possible. This histogram records the location hash of callers to ProfilePolicyConnector::IsManaged() to find out cases where special consideration is required. Recorded for ChromeOS only. troywang@google.com chromeos-data-team@google.com Recorded after browser startup for each state that the report initializer enters. Each state in the initializer is a precondition check, such as device settings being owned, start up delay wait, oobe being completed, and device policies being trusted. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record whether the ActivateDate was read from VPD and parsed successfully. This histogram is recorded after browser start up, when the device attempts to report the churn monthly cohort use case. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record success when the last powerwash time file is read successfully. This histogram is recorded after browser start up, while checking the preconditions of whether to initialize the ReportController. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record success when the oobe completed file was created more than 1 minute from when the oobe file stat is read. This histogram is recorded after browser start up, while checking the preconditions of whether to initialize the ReportController. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record whether the Psm Secret key is successfully read and parsed from VPD. This histogram is recorded after browser start up, while checking the preconditions of whether to initialize the ReportController. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record success if the PSM OPRF response for {PsmUseCase} contains a value. This network request is called after browser start if the last ping timestamp of the Chromebook is not known. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record success if the PSM OPRF response for {PsmUseCase} is able to be parsed correctly. This network request is called after browser start if the last ping timestamp of the Chromebook is not known. ChromeOS only. troywang@google.com chromeos-data-team@google.com Recorded if the system clock is synced successfully. This histogram is recorded after browser start up and after ReportController is initialized and connected to the network. ChromeOS only. troywang@google.com chromeos-data-team@google.com Recorded as true if the ChromeOS device is a VM or in Cros Debug mode. This histogram is recorded after browser start up, while checking the preconditions of whether to initialize the ReportController. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record the market segment assigned to the ChromeOS device after oobe is completed. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record whether the preserved file read and successfully parsed all known last active UTC dates. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record whether the preserved file was written successfully over DBus for last active UTC dates. This histogram is recorded after browser start up, when the device attempts to read the preserved file storing the last known UTC dates. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record whether the private set membership query response contains queried ID that is known or not known. This histogram is recorded after the check membership request is fulfilled by the Fresnel server. The response code indicates whether the queried ID is present in the privacy complaint PSM database. ChromeOS only. troywang@google.com chromeos-data-team@google.com Emit the NetError code associated with the {PsmUseCase} {PsmRequest} response. Network requests are called after the browser is instantiated and the device is connected to the internet. Enum for histogram will contain 0 - 899. Ranges are defined //net/base/net_error_list.h;l=14-23. ChromeOS only. troywang@google.com chromeos-data-team@google.com Records the time delay before Fresnel reporting should start, based on the first chrome run time. Reporting starts if the device has been running for greater than 1 hour. A 1 hour threshold is used to give the device enough time to avoid spurious check membership requests to the PSM server after device powerwash. ChromeOS Only. troywang@google.com chromeos-data-team@google.com Record the device policy trusted status assigned to the ChromeOS device. This is recorded after browser startup and after the oobe completed file was written for at least 1 minute. ChromeOS only. troywang@google.com chromeos-data-team@google.com Record true if the {PsmUseCase} triggers a ping on a specific day. This happens when the device has not sent a ping within the reporting window, as the device only pings once per period. For instance, in the 1DA use case, this histogram is recorded once per day to avoid duplicate pings. This histogram is recorded after browser start depending on the last ping timestamp of the Chromebook. ChromeOS only. qianwan@google.com chromeos-data-team@google.com Record the number of different failed/success cases for the {PsmUseCase} check membership process. ChromeOS only. zoraiznaeem@chromium.org cros-sw-perf@google.com Relative smoothness of animations when rotating screen. 100% represents ideally smooth 60 frames per second. 50% represents only 30 frames per second is achieved during the animations. 0% should not happen. This metric is recorded exactly once when the user rotates the screen. jhtin@google.com essential-inputs-team@google.com Measures the time between the start of a request for {Type} and when a response is recieved. jhtin@google.com essential-inputs-team@google.com This histogram captures user interaction and states as a user uses the Scanner feature. cowmoo@google.com cros-p13n-eng@google.com Records the number of thumbnails received with a max count of 8. Only recorded if API status code is kOk. This histogram is only used when SeaPenTextInput is not enabled. cowmoo@google.com cros-p13n-eng@google.com Records the number of thumbnails received with a max count of 4. Only recorded if API status code is kOk. This histogram is only used when SeaPenTextInput is enabled. cowmoo@google.com cros-p13n-eng@google.com Records if an image is received. Only recorded if API status code is kOk. Recorded for SeaPen Wallpaper. Warning: this histogram was expired from 2025-05-04 to 2025-06-04; data may be missing. cowmoo@google.com cros-p13n-eng@google.com API latency after clicking Create or Inspire Me button in VC Background or SeaPen Wallpaper. Only recorded if thumbnails were successfully retrieved. cowmoo@google.com cros-p13n-eng@google.com Records the returned Manta status code for thumbnails or wallpaper. Only recorded if the request completed before the enforced timeout. cowmoo@google.com cros-p13n-eng@google.com Records if the request hits the enforced timeout. cowmoo@google.com cros-p13n-eng@google.com Records the user's selected template when they create SeaPen thumbnails. Record for both SeaPen VC Background and Wallpaper. thuongphan@google.com cros-p13n-eng@google.com Records the number of thumbnails received for a freeform query. Only recorded if API status code is kOk. thuongphan@google.com cros-p13n-eng@google.com Records if an image is received for a freeform query. Only recorded if API status code is kOk. Recorded for SeaPen Wallpaper. thuongphan@google.com cros-p13n-eng@google.com API latency after clicking Create or Inspire Me button in VC Background or SeaPen Wallpaper for a freeform query. Only recorded if thumbnails were successfully retrieved. thuongphan@google.com cros-p13n-eng@google.com Records the returned Manta status code for thumbnails or wallpaper for a freeform query. Only recorded if the request completed before the enforced timeout. thuongphan@google.com cros-p13n-eng@google.com Records if the request for a freeform query hits the enforced timeout. cowmoo@google.com cros-p13n-eng@google.com Emmitted when the user clicks a sample prompt for a freeform query. cowmoo@google.com cros-p13n-eng@google.com Emmitted when the user shuffles the sample prompts for a freeform query. cowmoo@google.com cros-p13n-eng@google.com Emmitted when the user clicks a suggestion for a freeform query. cowmoo@google.com cros-p13n-eng@google.com Emmitted when the user shuffles the suggestions for a freeform query. cowmoo@google.com cros-p13n-eng@google.com Emitted when the user clicks on a freeform tab. thuongphan@google.com cros-p13n-eng@google.com Record the action menu item click for SeaPen recent image generated from free text query of each {AppName} from the user. cowmoo@google.com cros-p13n-eng@google.com Emitted when a user navigates to the Freeform SeaPen page in the {AppName} App. thuongphan@google.com cros-p13n-eng@google.com Emmitted when the user sets a {Source} SeaPen image that generated from free text query as {AppName}. thuongphan@google.com cros-p13n-eng@google.com Records the user's selected template when they navigates to the template subpage. cowmoo@google.com cros-p13n-eng@google.com Records the template ID of the image when the user clicks a thumbnail to set it as their VC Background or Wallpaper. cowmoo@google.com cros-p13n-eng@google.com Records the number of words in the SeaPen text query when the user clicks the create button. thuongphan@google.com cros-p13n-eng@google.com Record the action menu item click for SeaPen recent image of each {AppName} from the user. Warning: this histogram was expired from 2025-03-03 to 2025-06-04; data may be missing. cowmoo@google.com cros-p13n-eng@google.com Emitted when a user navigates to the SeaPen page in the {AppName} App. This metric is not emitted for the freeform page -- the freeform page emits `Ash.SeaPen.Freeform.{AppName}.Visited`. cowmoo@google.com cros-p13n-eng@google.com Emmitted when the user sets a {Source} SeaPen image as {AppName}. cowmoo@google.com cros-p13n-eng@google.com Record the thumbs up/thumbs down feedback for SeaPen template {TemplateName} from the user. Emits true if the feedback is positive, false otherwise. Recorded for both SeaPen VC Background and Wallpaper. andrewxu@chromium.org The outcome of drive file suggestion data validation. Recorded once per validation. tbarzic@chromium.org chromeos-launcher@google.com The duration of failed local Drive FS search when generating file suggestions based on recent drive activity. The suggestions are generated on demand when the user opens a supported UI surface - e.g. continue section in the launcher. The suggestions are generated by performing multiple queries on Drive FS. {SearchType} describes the type of query the search is handling. tbarzic@chromium.org chromeos-launcher@google.com The duration of successful local Drive FS search when generating file suggestions based on recent drive activity. The suggestions are generated on demand when the user opens a supported UI surface - e.g. continue section in the launcher. The suggestions are generated by performing multiple queries on Drive FS. {SearchType} describes the type of query the search is handling. "Total" variant records the total time needed to generate file suggestions. tbarzic@chromium.org chromeos-launcher@google.com The index of the first file suggested because it was shared with user in the ordered list of drive file suggestions based on the local Drive FS search. The suggestions are, for example, displayed in Launcher Continue Section. Warning: this histogram was expired from 2024-10-01 to 2025-01-31; data may be missing. tbarzic@chromium.org chromeos-launcher@google.com The number of folder items returned by local Drive FS search while generating file suggestions based on recent drive activity. The suggestions are generated on demand when the user opens a supported UI surface - e.g. continue section in the launcher. The suggestions are generated by performing multiple queries on Drive FS. {SearchType} describes the type of query the search is handling. tbarzic@chromium.org chromeos-launcher@google.com The number of items returned by local Drive FS search while generating file suggestions based on recent drive activity. The suggestions are generated on demand when the user opens a supported UI surface - e.g. continue section in the launcher. The suggestions are generated by performing multiple queries on Drive FS. {SearchType} describes the type of query the search is handling. "Total" variant records the total number of generated suggestions. tbarzic@chromium.org chromeos-launcher@google.com Whether a drive file returned by local drive FS search while generating file suggestions based on recent drive activity (used for example in launcher continue section) contains last modifying user metadata. Recorded while generating file suggestions for each file suggestion that's surfaced because it's been recently modified, in which case the suggestion justification string depends on last modifying user metadata. Warning: this histogram was expired from 2024-10-01 to 2025-01-31; data may be missing. tbarzic@chromium.org chromeos-launcher@google.com The result of a local Drive FS query operation performed while generating file suggestions based on recent drive activity. The suggestions are generated on demand when the user opens a supported UI surface - e.g. continue section in the launcher. The suggestions are generated by performing multiple queries on Drive FS. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Records the length of remaining un-transcribed audio when the audio capture stops. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Records the time user needs to wait to get the final speech recognition result after audio capture stops. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com Records the network error or HTTP response code of server based speech recognition request when an an error occurred. dmblack@google.com tbarzic@chromium.org chromeos-launcher@google.com Records the default apps that are pinned to the shelf. This metric is recorded with every UMA log upload. anasalazar@google.com mmourgos@google.com chromeos-launcher@google.com Tracks the number of menu items that are enabled in a shelf item's secondary menu. This metric is only recorded when a menu item is selected. Warning: this histogram was expired from 2023-08-13 to 2025-02-22; data may be missing. anasalazar@chromium.org mmourgos@google.com Tracks the index of the selected menu item in a shelf item's secondary menu. This metric is only recorded when a menu item is selected. anasalazar@google.com mmourgos@google.com chromeos-launcher@google.com The number of icons in the shelf, not including the App Launcher icon. This metric is recorded every 30 minutes. anasalazar@chromium.org mmourgos@google.com The number of pinned icons in the shelf, not including the App Launcher icon. This metric is recorded every 30 minutes. anasalazar@chromium.org mmourgos@google.com The number of unpinned icons in the shelf. This metric is recorded every 30 minutes. antrim@google.com cros-lurs@google.com Track actions on the shutdown confirmation bubble, if it's opened, dismissed or which buttons are clicked. Warning: this histogram was expired from 2025-04-24 to 2025-11-25; data may be missing. antrim@google.com cros-lurs@google.com Emitted at device start-up if a shut-down was previously initiated from the shelf shutdown button. In other words this metric is only recorded if a shelf shutdown button was pressed and the device was powered up again soon after that. Warning: this histogram was expired from 2023-09-10 to 2024-04-24; data may be missing. kuscher@google.com tbarzic@chromium.org The current state of the shelf (alignment) when the shelf launcher is used to launch an app/window/etc, this is used instead of log in to give data on users that do not lock/unlock or log in frequently. jimmyxgong@chromium.org cros-device-enablement@google.com Record which accelerator is added by the user for {ActionName}. This metric also includes accelerators added from editing an accelerator. A shortcut is encoded as an int where the high 16 bits represent all the modifiers used, and the 0-15 bits represent which key is used. jimmyxgong@chromium.org cros-device-enablement@google.com Tracks the subactions that can occur when the user attempts to add a custom accelerator. jimmyxgong@chromium.org cros-device-enablement@google.com Tracks the number of times a shortcut customization action has taken place from the Key Shortcuts App. jimmyxgong@chromium.org cros-device-enablement@google.com Record the number of customizations before the user resets their shortcuts to default. jimmyxgong@chromium.org cros-device-enablement@google.com Record the number of customized accelerator modifications on startup. jimmyxgong@chromium.org cros-device-enablement@google.com Tracks the subactions that can occur when the user attempts to edit an accelerator. jimmyxgong@chromium.org cros-device-enablement@google.com Tracks the actions done in the accelerator edit dialog before it was closed. If an action has been done at least once it will count towards the appropriate enum. Enums are formatted such that they are ordered in a bitwise manner. 0000: no action, 0001: Add, 0010: Edit, 0100: Remove, 1000: Reset. jimmyxgong@chromium.org cros-device-enablement@google.com Tracks the number of times a user navigates to a main category in the side panel of the Key Shortcuts app. jimmyxgong@chromium.org cros-device-enablement@google.com Record what modification actions that were done for {ActionName}. jimmyxgong@chromium.org cros-device-enablement@google.com Record which default accelerator is removed by the user for {ActionName}. A shortcut is encoded as an int where the high 16 bits represent all the modifiers used, and the 0-15 bits represent which key is used. xdai@chromium.org chromeos-wm@google.com The elapsed time between a first snapped window getting closed and a second snapped window getting closed. Starts recording when a snapped window is closed. Ends recording when a snapped window on the opposite side is closed, or if a snapped window on the opposite side is unsnapped, records the maximum value of 50 hours (18000 seconds). Warning: this histogram was expired from 2025-01-26 to 2025-04-08; data may be missing. xdai@chromium.org chromeos-wm@google.com The elapsed time between a first snapped window getting minimized and a second snapped window getting minimized. Starts recording when a window changes state from snapped to minimized. Ends recording when a second window changes state from snapped to minimized, or if the first window is no longer snapped on the same side, records the maximum value of 50 hours (18000 seconds). Warning: this histogram was expired from 2025-01-26 to 2025-04-08; data may be missing. xdai@chromium.org chromeos-wm@google.com The elapsed time between a first window getting snapped and a second window getting snapped on the other side. Starts recording when one window gets snapped. Ends recording when another window is snapped on the other side of the screen, or if the first window is no longer snapped on the same side, records the maximum value of 50 hours (18000 seconds). xdai@chromium.org chromeos-wm@google.com Records the duration of a Snap Group where the two snapped windows remain unchanged throughout its existence. xdai@chromium.org chromeos-wm@google.com Records the exit point of a Snap Group. xdai@chromium.org chromeos-wm@google.com Records the duration of a Snap Group where one of the windows remains in the Snap Group even after the other window is replaced using 'Snap to Replace'. xdai@chromium.org chromeos-wm@google.com Emitted when there's a change in the number of snap groups, i.e. a group is added or removed. Specifies the number of available snap groups. xdai@chromium.org chromeos-wm@google.com Recorded at the time a window is snapped via a snap action source that can start faster split view. Emits true if faster split view is enabled, false otherwise. dorianbrandon@google.com bzielinski@google.com cros-projector@google.com The length of the speech recognition session happening on {Location}. This histogram records the length at the end of the session. zxdan@chromium.org fanafan@google.com Emitted at entry to split view mode and each time the orientation or the device mode changes to report whether the device is in clamshell mode or tablet mode and whether the orientation is landscape or portrait. xdai@chromium.org zxdan@chromium.org chromeos-wm@chromium.org Emitted at the entry point of split view mode, to report the device orientation is in landscape mode (left and right) or portrait mode (top and bottom). Warning: this histogram was expired from 2025-01-05 to 2025-07-21; data may be missing. xdai@chromium.org zxdan@chromium.org chromeos-wm@chromium.org Emitted at the entry point of split view mode, to report the device is in clamshell mode or tablet mode. xdai@chromium.org zxdan@chromium.org chromeos-wm@chromium.org Emitted when device orientation changes in split view, to report the device orientation is in landscape mode (left and right) or portrait mode (top and bottom). Warning: this histogram was expired from 2025-03-11 to 2025-07-21; data may be missing. xdai@chromium.org zxdan@chromium.org Emitted at the end of split view mode to report the number of resizing window operations in split view mode session for both clamshell and tablet mode. xdai@chromium.org chromeos-wm@google.com Emitted at the end of split view mode to report the number of swap window operations in split view mode session. xdai@chromium.org chromeos-wm@google.com The amount of time that the user spent in multi-display split view mode, meaning that split view is active on more than one display. The time is measured from when the number of displays in split view becomes more than one to when it drops back down to one. Warning: this histogram was expired from 2025-05-21 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com The amount of time that the user spent in split view mode. The time is measured from the moment a window is snapped to one side of the screen to when split view mode is ended. xdai@chromium.org zxdan@chromium.org fanafan@chromium.org Emitted at the end of split view mode or the point of switching between clamshell mode and tablet mode in split view, to report the engagement time of general split view and multi-display split view in both clamshell mode and tablet mode. xdai@chromium.org chromeos-wm@google.com Records the index of the selected window in partial overview. Starts indexing at 0. xdai@chromium.org chromeos-wm@google.com Recorded at the exit point of the split view overview session in {TabletOrClamshellMode}. Emits true if the window layout setup is complete, false otherwise. xdai@chromium.org chromeos-wm@google.com Records the total number of windows in partial overview when a window is selected. xdai@chromium.org chromeos-wm@google.com Recorded at the exit point of the split view overview session in {TabletOrClamshellMode}. The recorded enum indicates the reason that triggers the split view overview session exit. xdai@chromium.org chromeos-wm@google.com Relative smoothness of animation when releasing the split view divider, recorded when the animation completes. 100% represents ideally smooth 60 frames per second. xdai@chromium.org chromeos-wm@google.com Maximum latency of the presentation time while resizing one or two split view windows. {SplitViewResizeModes} xdai@chromium.org chromeos-wm@google.com Presentation time while resizing one or two split view windows. {SplitViewResizeModes} newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the bounce in animation of tray background view. 100% represents ideally smooth 60 frames per second. Emitted when animation is completed (when the shelf pod/tray background view is completely bounced in and shown the tray). newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade in animation of tray background view. 100% represents ideally smooth 60 frames per second. Emitted when animation is completed (when the shelf pod/tray background view is completely faded in and shown the tray). newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade in animation of tray background view. 100% represents ideally smooth 60 frames per second. Emitted when animation is completed (when the shelf pod/tray background view is completely hidden in the tray). newcomer@chromium.org cros-status-area-eng@google.com Logged when: Hidden: a TrayBackgroundView's preferred visibility is set to false. Shown: a TrayBackgroundView's preferred visibility is set to true. Pressed: Logged when a TrayBackgroundView is activated, either showing a bubble or handling a custom action. The metric is expired from 2023-01-19 to 2023-03-15, so it's possible some data is dropped during that time. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the hide animation of tray item view. 100% represents ideally smooth 60 frames per second. Emitted when animation is completed (when the tray item is completely hidden in the tray). newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the show animation of tray item view. 100% represents ideally smooth 60 frames per second. Emitted when animation is completed (when the tray item is completely shown in the tray). amehfooz@chromium.org tbarzic@chromium.org Presentation time while opening QuickSettings and Notification Center through Status Area button. Emitted when QuickSettings and Notification Center are opened and shown. skau@google.com cowmoo@google.com Whether or not to use the kmeans algorithm to determine the user's color palette. This metric is recorded once per UMA upload. yichenz@chromium.org chromeos-wm@google.com Maximum presentation time recorded during a tab dragging session in both clamshell and tablet mode. {TabletOrClamshellMode} yichenz@chromium.org chromeos-wm@google.com Presentation time in ms when a tab is dragged. In clamshell mode, each time a tab is dragged within a display, the time it takes to present the new frame on screen is recorded. In tablet mode (with webui tab strip enable), dragging between displays is precluded, thus each time a tab is dragged, the time it takes to present the new frame to screen is recorded. {TabletOrClamshellMode} oshima@chromium.org xdai@chromium.org chromeos-wm@google.com Relative smoothness of animations when entering tablet mode, recorded when the animation completes. 100% represents ideally smooth 60 frames per second. oshima@chromium.org xdai@chromium.org chromeos-wm@google.com Relative smoothness of animations when exiting tablet mode, recorded when the animation completes. 100% represents ideally smooth 60 frames per second. oshima@chromium.org chromeos-wm@google.com Chrome OS only. The computed angle between the lid and the keyboard panel. These values are imprecise and may be tens of degrees off from reality. Reported once per hour that the system is awake, and not reported if the system doesn't have two accelerometers. xdai@chromium.org chromeos-wm@google.com The length of time that TouchView is active, for each activation. xdai@chromium.org chromeos-wm@google.com The proportion of time spent in TouchView during a session. xdai@chromium.org chromeos-wm@google.com The total time that TouchView is active during a session. xdai@chromium.org chromeos-wm@google.com The length of time between TouchView activations. Warning: this histogram was expired from 2023-03-19 to 2023-11-06; data may be missing. xdai@chromium.org chromeos-wm@google.com The total time that TouchView is not active during a session. Warning: this histogram was expired from 2023-03-19 to 2023-11-06; data may be missing. oshima@chromium.org chromeos-wm@google.com Relative smoothness of all animations applied during the unlock process. 100% represents the ideal smoothness for 60 frames per second. The metric was expired from 2022-04-18 to 2023-07-12 (revived in M117), it's possible some data was dropped during that time. {TabletOrClamshellMode} newcomer@chromium.org cros-status-area-eng@google.com Record the number of times that the video conference tray repeatedly shows per 100ms. Emitted when the sequence of consecutive shows in the video conference tray has finished. newcomer@google.com cros-status-area-eng@google.com Records the app type of the media app that users want to return to when they click the return to app button in the video conference panel. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade out animation of the return to app button inside the video conference controls. 100% represents ideally smooth 60 frames per second. Emitted when the fade out animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the bounds change animation of the return to app panel inside the video conference controls. 100% represents ideally smooth 60 frames per second. Emitted when the bounds change animation is completed. newcomer@chromium.org cros-status-area-eng@google.com Relative smoothness of the fade in animation of the {ViewName} inside the video conference controls. 100% represents ideally smooth 60 frames per second. Emitted when the fade in animation is completed. newcomer@google.com cros-status-area-eng@google.com Records the background blur state that users want to switch to when they choose a different value for background blur effect in the tab slider of the video conference panel. newcomer@google.com cros-status-area-eng@google.com Records the initial state of background blur when the Video Conference Panel is shown. amoylan@google.com cros-status-area-eng@google.com Recorded when the background image button in video conference tray is clicked to apply background image replace. amoylan@google.com cros-status-area-eng@google.com Recorded when the "Create with AI" button in video conference tray is clicked to open VcBackgroundApp. newcomer@google.com cros-status-area-eng@google.com Recorded when the stop screen share button in video conference tray is clicked. newcomer@google.com cros-status-area-eng@google.com Recorded when the toggle bubble button in video conference tray is clicked to open/close the bubble. newcomer@google.com cros-status-area-eng@google.com Recorded when the {Device} mute button in video conference tray is clicked. We will record if the user clicks the button to mute or to un-mute the {Device}. newcomer@google.com cros-status-area-eng@google.com Recorded when the toggle button of {EffectName} in the video conference bubble is clicked. We will record if the user clicks the button to enable or disable the effect. newcomer@google.com cros-status-area-eng@google.com Records the initial state of {EffectName} when the Video Conference Panel is shown. jasontt@chromium.org cros-p13n-eng@google.com The wallpaper collection of the selected online wallpaper. Recorded each time the online wallpaper image is selected, but not when wallpaper is automatically refreshed. jasontt@chromium.org cros-p13n-eng@google.com The wallpaper collection of the online image currently set as the active wallpaper. Emitted once for every UMA upload. xiaohuic@chromium.org cros-p13n-eng@chromium.org The custom wallpaper layout type. Recorded when the user sets a new custom wallpaper or changes the existing custom wallpaper's layout. thuongphan@google.com cowmoo@google.com cros-p13n-eng@google.com Records the section of the Wallpaper App from which a Google Photos wallpaper was selected. Emitted regardless of the selection's success. jasontt@chromium.org cros-p13n-eng@google.com The selected online wallpaper. Recorded each time the online wallpaper image is selected, but not when wallpaper is automatically refreshed. jasontt@chromium.org cros-p13n-eng@google.com The online image currently set as the active wallpaper. Emitted once for every UMA upload. jasontt@chromium.org cros-p13n-eng@google.com Whether the current online image currently set as the active wallpaper has the collection_id field. Older versions of ChromeOS (pre M107) did not set this field, so this metric tracks how many users selected an older online wallpaper and have not updated it since. Emitted once for every UMA upload. jasontt@chromium.org cros-p13n-eng@google.com Whether the current online image currently set as the active wallpaper has the unit_id field. Older versions of ChromeOS (pre M107) did not set this field, so this metric tracks how many users selected an older online wallpaper and have not updated it since. jasontt@chromium.org cros-p13n-eng@google.com Tracks the preview mode usage for wallpaper. Recorded each time the wallpaper image is previewed. thuongphan@chromium.org cros-p13n-eng@google.com The template of the Sea Pen image currently set as the active wallpaper. Emitted once for every UMA upload. cowmoo@google.com cros-p13n-eng@google.com Tracks whether the time of day wallpaper is set to be the default wallpaper successfully on supported devices. Recorded each time the user goes through OOBE flow and they did not have any synced wallpaper on any of their previous devices. thuongphan@chromium.org cros-p13n-eng@google.com Recorded when a user attempts to set a wallpaper, either by the built-in Wallpaper App, or by a third party App. Note the wallpaper change triggered by Sync file system event doesn't count. kuscher@google.com cros-p13n-eng@google.com The wallpaper type. Recorded at user login. This metric expired in April 2022 and was revived in August 2022. Data between these times is incomplete. jasontt@chromium.org cros-p13n-eng@google.com Tracks the latency of migration for wallpaper info of type {Type}. Recorded after the migration is completed on user's login. jasontt@chromium.org cros-p13n-eng@google.com Tracks the status of migration for wallpaper info of type {Type}. Recorded after the migration is completed on user's login. thuongphan@chromium.org cros-p13n-eng@google.com Tracks the result of user's attempt to set a wallpaper of type {Type}. Replaces the previous Result histogram where there is a misreport of online wallpapers. Recorded when a user selects a {Type} wallpaper from the personalization hub. wutao@chromium.org xdai@chromium.org Relative smoothness of cross fade animation when setting window bounds. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. This metric is recorded exactly once when SetBoundsDirectCrossFade is called, such as when window is maximized. wutao@chromium.org xdai@chromium.org chromeos-wm@google.com When dragging a maximized window, the window will shrink to restore bounds. Dragging the window back to the top of the screen will expand the window. This histogram is fired only if the window is initially maximized. If we drag a normal window to maximized state, the animation smoothness will be recorded in the regular cross fade histogram above. This histogram will be recorded to measure the smoothenss of the expand animation. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. xdai@chromium.org chromeos-wm@google.com When dragging a maximized window, the window will shrink to restore bounds. This histogram is fired everytime we drag a maximized window to normal state. This histogram will be recorded to measure the smoothness of the shrink animation. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. xdai@chromium.org chromeos-wm@google.com Relative smoothness of hiding window animation. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. This metric is recorded exactly once when AnimateHideWindowCommon is called, such as when window is closed. xdai@chromium.org chromeos-wm@google.com Relative smoothness of minimizing window animation. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. This metric is recorded exactly once when AnimateHideWindow_Minimize is called, such as when window is minimized. xdai@chromium.org chromeos-wm@google.com Relative smoothness of snapping window animation. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. This metric is recorded exactly once when a window is snapped to the left or right in clamshell mode using the alt + [ or ] accelerator, but only if the size of the window's bounds change. xdai@chromium.org chromeos-wm@google.com Relative smoothness of unminimizing window animation. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. This metric is recorded exactly once when AnimateShowWindow_Minimize is called, such as when window is unminimized. xdai@chromium.org chromeos-wm@chromium.org Emitted when a window state is being destroyed. Records number of mis-triggers of the drag to maximize behavior for a window during its lifetime. Warning: this histogram was expired from 2025-04-01 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@chromium.org This boolean keeps tracking if a drag to maximize behavior is valid or not. Emits true if a window is dragged to maximized and stays maximized status over 5 seconds. If a window is dragged to maximized, but gets restored during 5 seconds, the drag to maximize behavior should be considered as invalid and a mis-trigger. Warning: this histogram was expired from 2025-01-05 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@chromium.org The amount of time a user keeps a partial split window open and visible. Starts recording when a user partial splits through the multitask menu, or activates a desk that contains a partial window. Ends recording when the window is closed, changes window state, is snapped/dragged/resized to a non-partial snap ratio, gets moved to an inactive desk, or a different desk is activated. xdai@chromium.org chromeos-wm@google.com Emitted when the user snaps the window to record whether window snap is used while the display orientation is portrait or landscape mode. xdai@chromium.org chromeos-wm@google.com Emitted when the user ends window cycling via Alt-Tab, if and only if user had 2 or more desks and a new window was activated, to report the distance between the active desks before and after window cycling. A distance of 0 means no desks switch occurred. xdai@chromium.org chromeos-wm@google.com Records the presentation time, which is the time in milliseconds it takes from when the window cycle event (alt+tab) was received to when the next frame is shown to the user. This does not include the 150ms delay for window cycle (for users who switch so fast they do not need the UI). xdai@chromium.org chromeos-wm@google.com Emitted when the user starts Alt-Tab, if and only if user had 2 or more desks and Bento is not disabled, to report the initial alt-tab mode, which signals user's saved and preferred mode. minch@chromium.org xdai@chromium.org The number of windows in the Alt+Tab selector. Only recorded once when cycling starts, not every time when Tab is pressed without releasing Alt. xdai@chromium.org chromeos-wm@google.com Emitted when the user switches the Alt-Tab mode, if and only if user had 2 or more desks and Bento is not disabled, to report whether the user switches the mode via a click or keyboard. xdai@chromium.org chromeos-wm@google.com Emitted when same app window cycling ends, if and only if user had 2 or more desks and Bento is not disabled, to report the same-desk vs all-desk mode selection. Warning: this histogram was expired from 2025-07-03 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits true when a same-app cycling session is started and false when a normal cycling session is started. xdai@chromium.org chromeos-wm@google.com The number of windows the user didn't have to tab through because they were using Alt-Backtick instead of Alt-Tab. Recorded as the number of non-same-app windows in the ending MRU list between the starting and chosen window in the initial cycling direction. Warning: this histogram was expired from 2025-07-03 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emitted when the user switches the Alt-Tab mode from a click or keyboard, if and only if user had 2 or more desks and Bento is not disabled, to report the alt-tab mode the user switches to. minch@chromium.org xdai@chromium.org The number of seconds between task switches triggered by the next window and previous window accelerator keys (ie Alt+Tab, Alt+Shift+Tab). yichenz@chromium.org chromeos-wm@google.com Relative smoothness of showing window animation when the window cycle view moves the next window into position when alt + tab is pressed. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. Warning: this histogram was expired from 2022-04-10 to 2023-02-22; data may be missing. yichenz@chromium.org chromeos-wm@google.com Relative smoothness of showing window animation when the window cycle view starts. 100% represents ideally smooth 60 frames per second. 50% represents when only 30 frames per second is achieved during the animations. 0% should not happen. Warning: this histogram was expired from 2022-04-10 to 2023-02-22; data may be missing. andrewxu@chromium.org tbarzic@chromium.org The final state after window drag gesture that started from the system shelf in tablet mode. Warning: this histogram was expired from 2023-10-08 to 2025-07-21; data may be missing. antrim@chromium.org cros-lurs@google.com How long it took for the screen lock process to complete. This does not include timeouts. Warning: this histogram was expired from M78 till M104 and from 2023-08-13 till 2024-04-24. Warning: this histogram was expired from 2025-08-31 to 2025-11-25; data may be missing. antrim@chromium.org cros-lurs@google.com How long it took for the screen lock process to complete, for timeouts only. Warning: this histogram was expired from M78 till M104. It was also expired from 2023-04-23 till 2023-07-10. Warning: this histogram was expired from 2024-12-01 to 2025-11-25; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits true if the resize widget is clicked to start the resizing while in mulit-window resizing mode. Warning: this histogram was expired from 2025-05-21 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits true if the resize widget is clicked to start the resizing while in mulit-window resizing mode. Warning: this histogram was expired from 2025-05-21 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits true if the resize widget shows on mouse hover on the ResizeWindows. Warning: this histogram was expired from 2025-05-21 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits true if the resize widget shows on mouse hover on the ResizeWindows and the two windows of the ResizeWindows are snapped. Warning: this histogram was expired from 2025-05-21 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window states type of the active application windows. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window bounds type of the active application windows. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window states type of the active application windows. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window states type of all opened application windows. Warning: this histogram was expired from 2025-06-29 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window bounds type of all opened application windows. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window states type of all opened application windows. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the window bounds type of freeformed application windows. Warning: this histogram was expired from 2025-06-29 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Emits every 30 minutes to report the number of opened application windows. xdai@chromium.org chromeos-wm@chromium.org Emitted when a window is to be snapped. Records different ways for a user to snap a window. Warning: this histogram was expired from 2025-03-11 to 2025-07-21; data may be missing. xdai@chromium.org chromeos-wm@google.com Records the time duration a user spends dragging when a window is not split. xdai@chromium.org chromeos-wm@google.com Records the time duration a user spends dragging when a window is split. xdai@chromium.org chromeos-wm@google.com Records the number of times a window drag results in a window split compared to other outcomes. xdai@chromium.org chromeos-wm@google.com Records the number of times the preview is shown when a window is not split. xdai@chromium.org chromeos-wm@google.com Records the number of times the preview is shown when a window is split. xdai@chromium.org chromeos-wm@google.com Records the window region where a window is split. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com The currently active app or window. Sampled during demo sessions and reported while the user remains active. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Records apps that have been launched by a user using the device during Demo mode. The sample is recorded when each app is launched. For any given app id, the metric is recorded only once per Demo Session. llin@chromium.org xiqiruan@chromium.org wanghaifan@google.com cros-demo-mode-eng@google.com The source of app launches in demo mode, either the shelf, the app list, the demo mode app, or the search result in the app list. xiqiruan@chromium.org cros-demo-mode-eng@google.com Records most popular apps usage time in Demo mode. The duration starts from app created and end on closed. Note apps could be closed by user or auto closed by program when idle time reaches. llin@google.com xiqiruan@chromium.org cros-demo-mode-eng@google.com The timestamp (i.e. milliseconds from the beginning of the Attract Loop video) at which the user broke the Demo Mode Attract Loop. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com The duration the user spent interacting with the demo session, measured from the first user activity to the last user activity. This metric rounds the duration to the nearest second and uses exponential bucketing capped at 1 hour. The value would be 0 when there is only one user activity in a demo session, i.e. the first user activity = the last user activity. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Records whether a window associated with GMSCore has been created during the demo session. llin@google.com xiqiruan@chromium.org cros-demo-mode-eng@google.com The duration a user spent on a given details page of the Highlights App. Only is recorded for Highlights App versions with the UI concept of a "details" page. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Unexpected Demo Mode Highlight app error. The metrics will be emitted when encounting an error. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com The first interaction (button clicks) after entering the Highlights app. The metric will be emitted once the user clicks on a button in Hightlights app, e.g. pillar page button or the home button on the home page. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com The time duration a user stays in each page of the Highlights app, e.g. the home page, each pillar page. The metric will be emitted when the user enters another page or exits the {HighlightsPageName}. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Tracks whether the idle logout warning was canceled or proceeded to logout. Note: the count of "shown" includes both cases, so the count of "shown and proceeded" is equal to "shown" minus "canceled". llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Tracks the reason for removal of pre-install demo resources. To support offline demo mode, factory Chrome OS devices will have a set of offline enabled demo mode apps pre-installed. These resources are removed once they are not needed anymore. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Tracks the result of requests to remove pre-installed demo resources. To support offline demo mode, factory Chrome OS devices will have a set of offline enabled demo mode apps pre-installed. These resources are removed once they are not needed anymore. This will record only requests that attempted deleting pre-installed resources from disk. Requests that fail early will be ignored. For example, a request will fail early if the device is in demo mode, or the resources have already been removed. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com A demo session starts when a user signs in using the policy-configured public account. It stops when the user signs out, either manually or after an idle timeout. Session length is the duration between the first user activity and the end of the session. It is recorded during signing out and reported on the next chrome run. This metric tracks the recorded session length rounded down to the nearest minute and is capped at 2 hours. llin@chromium.org xiqiruan@chromium.org wanghaifan@google.com cros-demo-mode-eng@google.com This records the result of each component initial loading during the demo mode setup process. This setup process will only proceed if both the app and the resources components loading succeeds. llin@chromium.org xiqiruan@chromium.org wanghaifan@google.com cros-demo-mode-eng@google.com This records the result of each component loading retry during the demo mode setup process. The retry is manually initiated after the setup process has encountered an error during the loading screen and been required to retry setup. This setup process will only proceed if both the app and the resources components loading succeeds. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com This records the time taken to download the demo mode resources when demo mode is setup for the first time. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com This records the time taken to enterprise-enroll the device when demo mode is setup for the first time. llin@chromium.org xiqiruan@chromium.org wanghaifan@google.com cros-demo-mode-eng@google.com The failure reason of the demo mode setup process. This includes both the intial and retry attemp, as well as both the component loading and enterprise enrollment process. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com When demo mode is setup for the first time, it must download the demo mode resources and enterprise-enroll the device. This records the time taken for these two steps to complete. (See DemoMode.Setup.DownloadDuration and DemoMode.Setup.EnrollDuration) llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Records the number of times an operator has encountered an error during the loading screen and been required to retry setup. This is only recorded after setup completes successfully. wanghaifan@google.com cros-demo-mode-eng@google.com The duration the user spent interacting with a demo mode signed-in experience managed guest session fallback shopper session, measured from the first user activity to the last user activity. This managed guest session fallback occurs when the device tries to sign in but encounters a failure. Note that the shopper session here is different from the Chrome OS session. A shopper session restarts after idling a period of time. A Chrome OS session can contain multiple shopper sessions. This metric rounds the duration to the nearest second and uses exponential bucketing capped at 1 hour. The value would be 0 when there is only one user activity in a demo session, i.e. the first user activity = the last user activity. wanghaifan@google.com cros-demo-mode-eng@google.com This records the result of the account cleanup request in demo mode signed in experience. It can be success or one of the possible failure reasons, such as the network error. Please refer to the enum class DemoSessionMetricsRecorder::DemoAccountRequestResultCode for more information. wanghaifan@google.com cros-demo-mode-eng@google.com This records the result of the account setup request in demo mode signed in experience. It can be success or one of the possible failure reasons, such as the network error. Please refer to the enum class DemoSessionMetricsRecorder::DemoAccountRequestResultCode for more information. wanghaifan@google.com xiqiruan@chromium.org cros-demo-mode-eng@google.com The duration the user spent interacting with a signed-in demo mode shopper session, measured from the first user activity to the last user activity. Note that the shopper session here is different from the Chrome OS session. A shopper session restarts after idling a period of time. A Chrome OS session can contain multiple shopper sessions. This metric rounds the duration to the nearest second and uses exponential bucketing capped at 1 hour. The value would be 0 when there is only one user activity in a demo session, i.e. the first user activity = the last user activity. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Records how many unique apps have been launched by a user using the device during Demo mode. The sample is recorded when the DemoMode session closes. llin@chromium.org xiqiruan@chromium.org cros-demo-mode-eng@google.com Records how many times the user clicks mouse and presses screen in the demo session. During one demo session, if a mouse click or screen press happens, increment this metric by one. zhangwenyu@google.com cros-device-enablement@google.com The zoom percentage that the user has set on the internal display and is actively using. This is emitted when the zoom factor has been updated in display manager and has not been changed for a while. jshargo@chromium.org oshima@chromium.org chromeos-gfx-compositor@google.com The way in which mirroring is implemented, either in hardware or software. This is emitted once when mirroring is enabled through API call, or the display configuration changes ( e.g. adding or removing a display) when mirror mode is on. zhangwenyu@google.com cros-device-enablement@google.com The types of mirror mode in which the displays connected to the device are in. This is emitted once when the normal or mixed mirror mode is enabled through API call, or the display configuration changes ( e.g. adding or removing a display) when mirror mode is on. Warning: this histogram was expired from 2023-04-23 to 2024-11-16; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com The mode in which the connected displays to the device are in. This is emitted once when displays are added or removed, or when the user changes the mode by e.g. enabling mirror or unified modes. zhangwenyu@google.com cros-device-enablement@google.com The number of displays connected to the device when Unified Desktop mode is on. This is emitted when Unified Desktop mode is turned on, or the displays are added or removed while in Unified Mode. zhangwenyu@google.com cros-device-enablement@google.com Records whether or not the display configuration was successfully updated. Emitted when the update-display-configuration task finishes, successfully or not. Warning: this histogram was expired from M102 to M117; data may be missing. zhangwenyu@google.com jimmyxgong@chromium.org cros-device-enablement@google.com Tracks mouse sensitivity setting changes by the user. This replaces the old Mouse.Sensitivity.Changed metric. Only reported on Chrome OS. jimmyxgong@chromium.org cros-device-enablement@google.com Tracks mouse sensitivity setting on startup. This replaces the old Mouse.Sensitivity.Started metric. Only reported on Chrome OS. Expired from 2022-12-04 to M113. May be missing some data. zhangwenyu@google.com cros-device-enablement@google.com Whether mouse scroll acceleration is enabled. Only reported on Chrome OS. Warning: this histogram was expired from 2025-12-01 to 2026-05-18; data may be missing. {PreferenceChangeType} zhangwenyu@google.com cros-device-enablement@google.com Mouse scroll sensitivity value. Only reported on Chrome OS. Warning: this histogram was expired from 2025-12-01 to 2026-05-18; data may be missing. {PreferenceChangeType} jimmyxgong@chromium.org cros-device-enablement@google.com Acceleration setting for pointing sticks (typically TrackPoints, the miniature red joysticks found in some laptop keyboards). Only reported on Chrome OS. Expired from 2021-04-01 to M113. May be missing some data. {PreferenceChangeType} jimmyxgong@chromium.org cros-device-enablement@google.com Sensitivity value for pointing sticks (typically TrackPoints, the miniature red joysticks found in some laptop keyboards). Only reported on Chrome OS. Expired from 2021-04-01 to M113. May be missing some data. {PreferenceChangeType} jimmyxgong@chromium.org cros-device-enablement@google.com Setting for the primary button of pointing sticks (typically TrackPoints, the miniature red joysticks found in some laptop keyboards). Only reported on Chrome OS. Expired from 2021-04-01 to M113. May be missing some data. {PreferenceChangeType} gavinwill@google.com cros-device-enablement@chromium.org Tracks touchpad haptic feedback setting changes by the user. Only reported on Chrome OS. gavinwill@google.com cros-device-enablement@chromium.org Tracks touchpad haptic feedback setting on startup. Only reported on Chrome OS. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad natural scroll setting changes by the user. Only reported on Chrome OS. Warning: this histogram was expired from 2022-06-15 to M105; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad natural scroll setting on startup. Only reported on Chrome OS. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad sensitivity setting changes by the user. This replaces the old Touchpad.Sensitivity.Changed metric. Only reported on Chrome OS. Warning: this histogram was expired from 2022-06-15 to M105; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad sensitivity setting on startup. This replaces the old Touchpad.Sensitivity.Started metric. Only reported on Chrome OS. Warning: this histogram was expired from 2022-06-15 to M105; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com Whether touchpad scroll acceleration is enabled. Only reported on Chrome OS. Warning: this histogram was expired from 2020-12-01 to M105, 2023-12-10 to M123; data may be missing. {PreferenceChangeType} zhangwenyu@google.com cros-device-enablement@google.com Touchpad scroll sensitivity value. Only reported on Chrome OS. Warning: this histogram was expired from 2020-12-01 to M105, 2023-12-10 to M123; data may be missing. {PreferenceChangeType} zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad TapDragging setting changes by the user. Only reported on Chrome OS. Warning: this histogram was expired from 2022-06-15 to M105; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad TapDragging setting on startup. Only reported on Chrome OS. Warning: this histogram was expired from 2022-06-15 to M105; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad TapToClick setting changes by the user. Only reported on Chrome OS. Warning: this histogram was expired from 2022-06-15 to M105; data may be missing. zhangwenyu@google.com cros-device-enablement@google.com Tracks touchpad TapToClick setting changes by the user. Only reported on Chrome OS.