Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/sync_file_system/sync_file_system_service.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 130 matching lines @@
       content::BrowserContext* browser_context,
       const extensions::Extension* extension,
       extensions::UnloadedExtensionInfo::Reason reason) override;
   void OnExtensionUninstalled(content::BrowserContext* browser_context,
                               const extensions::Extension* extension,
                               extensions::UninstallReason reason) override;
   void OnExtensionLoaded(content::BrowserContext* browser_context,
                          const extensions::Extension* extension) override;
 
   // syncer::SyncServiceObserver implementation.
-  void OnStateChanged() override;
+  void OnStateChanged(syncer::SyncService* sync) override;
 
   // SyncFileStatusObserver implementation.
   void OnFileStatusChanged(const storage::FileSystemURL& url,
                            SyncFileType file_type,
                            SyncFileStatus sync_status,
                            SyncAction action_taken,
                            SyncDirection direction) override;
 
   // Check the profile's sync preference settings and call
   // remote_file_service_->SetSyncEnabled() to update the status.
@@ skipping 21 matching lines @@
 
   bool promoting_demoted_changes_;
   base::Closure idle_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncFileSystemService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_