Add shutdown notification and service refs to SyncServiceObserver.

components/sync/driver/sync_error_controller.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/sync/driver/sync_error_controller.h"
 
 #include "components/sync/driver/sync_service.h"
 
 namespace syncer {
 
@@ skipping 10 matching lines @@
 }
 
 void SyncErrorController::AddObserver(Observer* observer) {
   observer_list_.AddObserver(observer);
 }
 
 void SyncErrorController::RemoveObserver(Observer* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
-void SyncErrorController::OnStateChanged() {
+void SyncErrorController::OnStateChanged(syncer::SyncService* sync) {
   for (auto& observer : observer_list_)
     observer.OnErrorChanged();
 }
 
 }  // namespace syncer