update_engine: Add metrics to duration to apply an update.
Add new metrics that record the time between an update being seen by the client
to the time when the update is actually applied.
This metric will be recorded only for Enterprise enrolled devices.
UpdateEngine.SuccessfulUpdate.TimeRestrictedDurationFromSeenToUpdateMinutes is
recorded when an update is applied while the
DeviceAutoUpdateTimeRestrictions device policy exists.
UpdateEngine.SuccessfulUpdate.DurationFromSeenToUpdateMinutes is
recorded when an update is applied without the policy.
BUG=chromium:852860
TEST=run updater manually and checked chrome://histograms
Change-Id: I4dd54fc4404ef2e66902113617841808c1f9e616
Reviewed-on: https://chromium-review.googlesource.com/1179230
Commit-Ready: May Lippert <maybelle@chromium.org>
Tested-by: May Lippert <maybelle@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/omaha_request_action.h b/omaha_request_action.h
index 1034c3f..e02c3be 100644
--- a/omaha_request_action.h
+++ b/omaha_request_action.h
@@ -322,6 +322,11 @@
// enabled.
void SetMaxKernelKeyVersionForRollback() const;
+ // Reads and returns the kPrefsUpdateFirstSeenAt pref if the pref currently
+ // exists. Otherwise saves the current wallclock time to the
+ // kPrefsUpdateFirstSeenAt pref and returns it as a base::Time object.
+ base::Time LoadOrPersistUpdateFirstSeenAtPref() const;
+
// Global system context.
SystemState* system_state_;