Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/ui/webui/settings/people_handler.h

 // Copyright 2015 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_UI_WEBUI_SETTINGS_PEOPLE_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SETTINGS_PEOPLE_HANDLER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 101 matching lines @@
   void FocusUI() override;
 
   // SigninManagerBase::Observer implementation.
   void GoogleSigninSucceeded(const std::string& account_id,
                              const std::string& username,
                              const std::string& password) override;
   void GoogleSignedOut(const std::string& account_id,
                        const std::string& username) override;
 
   // syncer::SyncServiceObserver implementation.
-  void OnStateChanged() override;
+  void OnStateChanged(syncer::SyncService* sync) override;
 
   // Returns a newly created dictionary with a number of properties that
   // correspond to the status of sync.
   std::unique_ptr<base::DictionaryValue> GetSyncStatusDictionary();
 
   // Helper routine that gets the ProfileSyncService associated with the parent
   // profile.
   browser_sync::ProfileSyncService* GetSyncService() const;
 
   // Returns the LoginUIService for the parent profile.
@@ skipping 67 matching lines @@
   ScopedObserver<SigninManagerBase, PeopleHandler> signin_observer_;
   ScopedObserver<browser_sync::ProfileSyncService, PeopleHandler>
       sync_service_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(PeopleHandler);
 };
 
 }  // namespace settings
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_PEOPLE_HANDLER_H_