[BackgroundSync Cleanup] Remove periodic sync code

content/browser/background_sync/background_sync_metrics.h

Index: content/browser/background_sync/background_sync_metrics.h
diff --git a/content/browser/background_sync/background_sync_metrics.h b/content/browser/background_sync/background_sync_metrics.h
index f92a7c5b7a3f6dd6f1e26cf36d820132f309dbe0..891e11494cd71f591c4386324eca222c1f5cbbe9 100644
--- a/content/browser/background_sync/background_sync_metrics.h
+++ b/content/browser/background_sync/background_sync_metrics.h
@@ -29,13 +29,10 @@ class BackgroundSyncMetrics {
   };
 
   // Records the start of a sync event.
-  static void RecordEventStarted(SyncPeriodicity periodicity,
-                                 bool startedin_foreground);
+  static void RecordEventStarted(bool startedin_foreground);
 
   // Records the result of a single sync event firing.
-  static void RecordEventResult(SyncPeriodicity periodicity,
-                                bool result,
-                                bool finished_in_foreground);
+  static void RecordEventResult(bool result, bool finished_in_foreground);
 
   // Records the result of running a batch of sync events, including the total
   // time spent, and the batch size.
@@ -46,17 +43,14 @@ class BackgroundSyncMetrics {
   // indicates whether the conditions were sufficient for the sync to fire
   // immediately at the time it was registered.
   static void CountRegisterSuccess(
-      SyncPeriodicity periodicity,
       RegistrationCouldFire could_fire,
       RegistrationIsDuplicate registration_is_duplicate);
 
   // Records the status of a failed sync registration.
-  static void CountRegisterFailure(SyncPeriodicity periodicity,
-                                   BackgroundSyncStatus status);
+  static void CountRegisterFailure(BackgroundSyncStatus status);
 
   // Records the result of trying to unregister a sync.
-  static void CountUnregister(SyncPeriodicity periodicity,
-                              BackgroundSyncStatus result);
+  static void CountUnregister(BackgroundSyncStatus result);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(BackgroundSyncMetrics);