ljjlee@google.com chrome-regionalcapabilities@google.com Records an overall active regional program for the profiles loaded in the current session, at the time the session is finalized. This histogram will be used by the UMA pipeline to tag all metrics in the session log, enabling per-program filtering and analysis. Emitted through ProvideCurrentSessionData, when a UMA session record is getting finalized. Is output only based on the currently-loaded profiles, and it is not output if there are zero currently-loaded profiles (context: https://crrev.com/c/7168123). ljjlee@google.com chrome-regionalcapabilities@google.com Records the regional program for the loaded profile when its session is finalized. This histogram will be used by the UMA pipeline to tag all metrics in the session log, enabling per-program filtering and analysis. Emitted through ProvideCurrentSessionData, when a UMA session record is getting finalized. {Profile} dgn@chromium.org chrome-regionalcapabilities@google.com Reports the outcomes of the resolution between the Android-determined program and the Chrome active country, to track how often inconsistencies might be resolved by reverting the program to Default. dgn@chromium.org chrome-regionalcapabilities@google.com Records whether the current default search engine was successfully found in the list of engines to be offered on the choice screen when highlighting is requested. Recorded when the profile is eligible to see a choice screen, and is putting together the data (list of engines, and if possible, which to highlight) to display on that choice screen. Should be emitted once per profile that show the choice screen, even if multiple windows (on desktop) are each showing a dialog. Warning: this histogram was expired from 2026-03-01 to 2026-05-04; data may be missing. dgn@chromium.org chrome-regionalcapabilities@google.com Records whether there is any active regional program for any of the loaded profiles. Recorded when a UMA session record is getting finalized. `false` if there are no loaded profiles, `true` otherwise. dgn@chromium.org chrome-regionalcapabilities@google.com Reports occurrences of some of program specific conditions for which we don't have some dedicated histogram, but want to monitor for debugging purposes. See the individual events for record timing. dgn@chromium.org chrome-regionalcapabilities@google.com Records the eligibility when attempting to trigger the choice screen relative to whether this was during the Chrome first run or not. Aggregating both flows ends up being equivalent to looking at "RegionalCapabilities.FunnelStage.Triggering". dgn@chromium.org chrome-regionalcapabilities@google.com Reports on the relative status of the fallback profile country and the Finch latest country. Recorded when the profile is loaded, when we failed fetching the country from the primary source (e.g. Finch or Play). This can commonly happen during the FRE for some platforms. Otherwise, RegionalCapabilities.FetchedCountryMatching is recorded. dgn@chromium.org chrome-regionalcapabilities@google.com Reports on the relative status of the fetched profile country and the Finch latest country. Recorded when the profile is loaded, when we succeeded fetching the country from the primary source (e.g. Finch or Play). Otherwise, RegionalCapabilities.FallbackCountryMatching is recorded. dgn@chromium.org ljjlee@chromium.org chrome-regionalcapabilities@google.com Records the condition state on profile load for whether the profile is possibly eligible for a search engine choice screen. {Profile} dgn@chromium.org chrome-regionalcapabilities@google.com Reports on the relative status of the profile country and the Finch latest country, in the context of the selected regional program. Recorded when the profile is loaded, for profiles that have been determined to be in-scope for a non-default program. Only one bucket is logged for a profile, the most specific one. This means that "region matches" is not logged when "country matches" is logged. dgn@chromium.org chrome-regionalcapabilities@google.com Reports on which stage of the regional capabilities funnel a given profile is in. (Internal-only: see go/chrome-taiyaki-metrics-dd for more info) Can be recorded by profiles on some key events like profile load or attempt to trigger a choice screen. {Profile} dgn@chromium.org ljjlee@chromium.org chrome-regionalcapabilities@google.com Records the condition state at choice screen triggering attempt, for whether we are determining the profile to be eligible for a search engine choice screen. This is recorded every time the dynamic eligibility state is being checked, which might be as often as every page navigation on desktop, or app warm open on iOS. If a profile was deemed ineligible at profile load time (as recorded by the RegionalCapabilities.FunnelStage.Eligibility histogram), this histogram will not be recorded. {Profile} dgn@chromium.org chrome-regionalcapabilities@google.com Reports which source of information is used by a given profile to determine the regional capabilities country. Recorded on each profile load. dgn@chromium.org chrome-regionalcapabilities@google.com Reports on the relative status of the persisted profile country and the Finch latest country. Recorded on each profile load.