[Background Sync] Gather UMA data for Background Sync

content/browser/background_sync/background_sync_manager.h

Index: content/browser/background_sync/background_sync_manager.h
diff --git a/content/browser/background_sync/background_sync_manager.h b/content/browser/background_sync/background_sync_manager.h
index e49c815894fcd003337c2519fdfa23313a6077ed..39080b74775525c37a5fe11cb1a4f9b4be704752 100644
--- a/content/browser/background_sync/background_sync_manager.h
+++ b/content/browser/background_sync/background_sync_manager.h
@@ -207,11 +207,12 @@ class CONTENT_EXPORT BackgroundSyncManager
       int64 sw_registration_id,
       const RegistrationKey& registration_key,
       BackgroundSyncRegistration::RegistrationId sync_registration_id,
+      SyncPeriodicity periodicity,
       const StatusCallback& callback);
-  void UnregisterDidStore(
-      int64 sw_registration_id,
-      const StatusCallback& callback,
-      ServiceWorkerStatusCode status);
+  void UnregisterDidStore(int64 sw_registration_id,
+                          SyncPeriodicity periodicity,
+                          const StatusCallback& callback,
+                          ServiceWorkerStatusCode status);
 
   // GetRegistration callbacks
   void GetRegistrationImpl(int64 sw_registration_id,
@@ -223,6 +224,8 @@ class CONTENT_EXPORT BackgroundSyncManager
                             SyncPeriodicity periodicity,
                             const StatusAndRegistrationsCallback& callback);
 
+  bool WouldFireRegistrationWithOptions(
+      const BackgroundSyncRegistrationOptions& options);
   bool IsRegistrationReadyToFire(
       const BackgroundSyncRegistration& registration);
 
@@ -261,6 +264,10 @@ class CONTENT_EXPORT BackgroundSyncManager
                              const base::Closure& callback,
                              ServiceWorkerStatusCode status_code);
 
+  // Called when all sync events have completed.
+  static void OnAllSyncEventsCompleted(const base::TimeTicks& start_time,
+                                       const base::Closure& callback);
+
   // OnRegistrationDeleted callbacks
   void OnRegistrationDeletedImpl(int64 registration_id,
                                  const base::Closure& callback);