Add shutdown notification and service refs to SyncServiceObserver.

ios/chrome/browser/ui/sync/sync_error_infobar_delegate.h

 // Copyright 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 IOS_CHROME_BROWSER_UI_SYNC_SYNC_ERROR_INFOBAR_DELEGATE_H_
 #define IOS_CHROME_BROWSER_UI_SYNC_SYNC_ERROR_INFOBAR_DELEGATE_H_
 
 #include <memory>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 33 matching lines @@
   InfoBarIdentifier GetIdentifier() const override;
 
   // ConfirmInfoBarDelegate implementation.
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   gfx::Image GetIcon() const override;
   bool Accept() override;
 
   // ProfileSyncServiceObserver implementation.
-  void OnStateChanged() override;
+  void OnStateChanged(syncer::SyncService* sync) override;
 
  private:
   gfx::Image icon_;
   ios::ChromeBrowserState* browser_state_;
   SyncSetupService::SyncServiceState error_state_;
   base::string16 message_;
   base::string16 button_text_;
   base::scoped_nsobject<GenericChromeCommand> command_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncErrorInfoBarDelegate);
 };
 
 #endif  // IOS_CHROME_BROWSER_UI_SYNC_SYNC_ERROR_INFOBAR_DELEGATE_H_