Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/ui/sync/one_click_signin_sync_observer.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 "chrome/browser/ui/sync/one_click_signin_sync_observer.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 43 matching lines @@
 
 void OneClickSigninSyncObserver::WebContentsDestroyed() {
   browser_sync::ProfileSyncService* sync_service =
       GetSyncService(web_contents());
   if (sync_service)
     sync_service->RemoveObserver(this);
 
   delete this;
 }
 
-void OneClickSigninSyncObserver::OnStateChanged() {
+void OneClickSigninSyncObserver::OnStateChanged(syncer::SyncService* sync) {
   browser_sync::ProfileSyncService* sync_service =
       GetSyncService(web_contents());
 
   // At this point, the sign-in process is complete, and control has been handed
   // back to the sync engine. Close the gaia sign in tab if the |continue_url_|
   // contains the |auto_close| parameter. Otherwise, wait for sync setup to
   // complete and then navigate to the |continue_url_|.
   if (signin::IsAutoCloseEnabledInURL(continue_url_)) {
     // Close the Gaia sign-in tab via a task to make sure we aren't in the
     // middle of any WebUI handler code.
@@ skipping 32 matching lines @@
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   return ProfileSyncServiceFactory::GetForProfile(profile);
 }
 
 // static
 void OneClickSigninSyncObserver::DeleteObserver(
     base::WeakPtr<OneClickSigninSyncObserver> observer) {
   if (observer)
     delete observer.get();
 }