curranmax@chromium.org tbansal@chromium.org

The duration the offline indicator was shown. Recorded when the offline indicator stops being shown. There are two differences between this histogram and OfflineIndicator.ShownDuration: 1) the maximum bucket size and total number of buckets are higher in this histogram, and 2) this histogram is persisted in perfs. The second point means that if the user backgrounds then kills Chrome when the Offline Indicator was shown, then we will still record a sample. Note that in this case, when the user opens Chrome again and if the Offline Indicator is shown, then it will be treated as a continuation from before Chrome was killed.

dimich@chromium.org offline-dev@chromium.org

Counts the number of times an offline page is accessed. Events are reported per offline pages namespace.

pnoland@chromium.org offline-dev@chromium.org

Whether the offline page status cached for a given tab agrees with the true value. Recorded with 1/100 probability each time the offline status for a tab is checked.

curranmax@chromium.org tbansal@chromium.org

Whether or not the OfflinePageNavigationThrottle canceled a navigation request. Requests are only canceled if and only if the navigation request was initiated by the renderer and the request headers contain the "X-Chrome-offline" header. This histogram is recorded each time Chrome tries to create an OfflinePageNavigationThrottle, which only happens on Android (since Offline Pages is only enabled there).