Allow MetricsReportingScheduler's histograms to be overriden.

components/metrics/metrics_reporting_scheduler.cc

Index: components/metrics/metrics_reporting_scheduler.cc
diff --git a/components/metrics/metrics_reporting_scheduler.cc b/components/metrics/metrics_reporting_scheduler.cc
index ab117ad01e96d3cc486840b01657b3928308e40e..625d546fea28391a85f575f42a7733fa9a727cb6 100644
--- a/components/metrics/metrics_reporting_scheduler.cc
+++ b/components/metrics/metrics_reporting_scheduler.cc
@@ -46,25 +46,6 @@ const double kBackoffMultiplier = 1.1;
 // The maximum backoff multiplier.
 const int kMaxBackoffMultiplier = 10;
 
-enum InitSequence {
-  TIMER_FIRED_FIRST,
-  INIT_TASK_COMPLETED_FIRST,
-  INIT_SEQUENCE_ENUM_SIZE,
-};
-
-void LogMetricsInitSequence(InitSequence sequence) {
-  UMA_HISTOGRAM_ENUMERATION("UMA.InitSequence", sequence,
-                            INIT_SEQUENCE_ENUM_SIZE);
-}
-
-void LogActualUploadInterval(TimeDelta interval) {
-  UMA_HISTOGRAM_CUSTOM_COUNTS("UMA.ActualLogUploadInterval",
-                             interval.InMinutes(),
-                             1,
-                             base::TimeDelta::FromHours(12).InMinutes(),
-                             50);
-}
-
 }  // anonymous namespace
 
 MetricsReportingScheduler::MetricsReportingScheduler(
@@ -136,6 +117,19 @@ void MetricsReportingScheduler::SetUploadIntervalForTesting(
   upload_interval_ = interval;
 }
 
+void MetricsReportingScheduler::LogMetricsInitSequence(InitSequence sequence) {
+  UMA_HISTOGRAM_ENUMERATION("UMA.InitSequence", sequence,
+                            INIT_SEQUENCE_ENUM_SIZE);
+}
+
+void MetricsReportingScheduler::LogActualUploadInterval(TimeDelta interval) {
+  UMA_HISTOGRAM_CUSTOM_COUNTS("UMA.ActualLogUploadInterval",
+                             interval.InMinutes(),
+                             1,
+                             base::TimeDelta::FromHours(12).InMinutes(),
+                             50);
+}
+
 void MetricsReportingScheduler::TriggerUpload() {
   // If the timer fired before the init task has completed, don't trigger the
   // upload yet - wait for the init task to complete and do it then.