Minor style cleanup in metrics_reporting_scheduler.*

chrome/browser/metrics/metrics_reporting_scheduler.h

Index: chrome/browser/metrics/metrics_reporting_scheduler.h
diff --git a/chrome/browser/metrics/metrics_reporting_scheduler.h b/chrome/browser/metrics/metrics_reporting_scheduler.h
index 063f61f091d27d697cb23b4264e42365f2d0138f..0d6044098f38ed74d7a65fce9382681e3e7a02f9 100644
--- a/chrome/browser/metrics/metrics_reporting_scheduler.h
+++ b/chrome/browser/metrics/metrics_reporting_scheduler.h
@@ -38,14 +38,14 @@ class MetricsReportingScheduler {
   void TriggerUpload();
 
   // Schedules a future call to TriggerUpload if one isn't already pending.
-  void ScheduleNextCallback();
+  void ScheduleNextUpload();
 
   // Increases the upload interval each time it's called, to handle the case
   // where the server is having issues.
   void BackOffUploadInterval();
 
   // The MetricsService method to call when uploading should happen.
-  base::Closure upload_callback_;
+  const base::Closure upload_callback_;
 
   base::OneShotTimer<MetricsReportingScheduler> upload_timer_;