[Sync] Enable adding notifier observers from ProfileSyncService

chrome/browser/sync/test_profile_sync_service.h

Index: chrome/browser/sync/test_profile_sync_service.h
diff --git a/chrome/browser/sync/test_profile_sync_service.h b/chrome/browser/sync/test_profile_sync_service.h
index 95a11da8009a9b3db089326b379a8aeb3ae88e7a..4924daae1106308a8996ed883cd703e77db5376b 100644
--- a/chrome/browser/sync/test_profile_sync_service.h
+++ b/chrome/browser/sync/test_profile_sync_service.h
@@ -60,7 +60,13 @@ class SyncBackendHostForProfileSyncTest : public SyncBackendHost {
   static void SetHistoryServiceExpectations(ProfileMock* profile);
 
   void SetInitialSyncEndedForAllTypes();
-  void dont_set_initial_sync_ended_on_init();
+
+  void EmitOnNotificationsEnabled();
+  void EmitOnNotificationsDisabled(
+      syncer::NotificationsDisabledReason reason);
+  void EmitOnIncomingNotification(
+      const syncer::ObjectIdPayloadMap& id_payloads,
+      const syncer::IncomingNotificationSource source);
 
  protected:
   virtual void InitCore(const DoInitializeOptions& options) OVERRIDE;