Histogram for recording actual log upload interval added.

components/metrics/metrics_reporting_scheduler.h

Index: components/metrics/metrics_reporting_scheduler.h
diff --git a/components/metrics/metrics_reporting_scheduler.h b/components/metrics/metrics_reporting_scheduler.h
index 6aa1f3914bc91bb065ee006beb1da48f1ad9b79c..3c0b7cc7d40cb017f0474255ccbcbf8adc57d116 100644
--- a/components/metrics/metrics_reporting_scheduler.h
+++ b/components/metrics/metrics_reporting_scheduler.h
@@ -66,6 +66,10 @@ class MetricsReportingScheduler {
   // upload.
   base::TimeDelta upload_interval_;
 
+  // The tick count of the last time log upload has been finished and 0 if no

[Alexei Svitkine (slow), 2014/10/15 20:44:19]

Nit: "and 0" -> "and null"

[gayane -on leave until 09-2017, 2014/10/15 21:02:00]

Done.

+  // upload has been done yet.
+  base::TimeTicks last_upload_finish_time_;
+
   // Indicates that the scheduler is running (i.e., that Start has been called
   // more recently than Stop).
   bool running_;