Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/extensions/external_pref_loader.cc

 // 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.
 
 #include "chrome/browser/extensions/external_pref_loader.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_enumerator.h"
@@ skipping 136 matching lines @@
     BrowserThread::PostTask(
         BrowserThread::FILE, FROM_HERE,
         base::Bind(&ExternalPrefLoader::LoadOnFileThread, this));
   }
 }
 
 void ExternalPrefLoader::OnIsSyncingChanged() {
   PostLoadIfPrioritySyncReady();
 }
 
-void ExternalPrefLoader::OnStateChanged() {
-  browser_sync::ProfileSyncService* service =
-      ProfileSyncServiceFactory::GetForProfile(profile_);
-  DCHECK(service);
-  if (!service->CanSyncStart()) {
+void ExternalPrefLoader::OnStateChanged(syncer::SyncService* sync) {
+  if (!sync->CanSyncStart())
     PostLoadAndRemoveObservers();
-  }
 }
 
 bool ExternalPrefLoader::PostLoadIfPrioritySyncReady() {
   DCHECK(options_ & DELAY_LOAD_UNTIL_PRIORITY_SYNC);
   DCHECK(profile_);
 
   sync_preferences::PrefServiceSyncable* prefs =
       PrefServiceSyncableFromProfile(profile_);
   DCHECK(prefs);
   if (prefs->IsPrioritySyncing()) {
@@ skipping 156 matching lines @@
   LoadFinished();
 }
 
 ExternalTestingLoader::~ExternalTestingLoader() {}
 
 const base::FilePath ExternalTestingLoader::GetBaseCrxFilePath() {
   return fake_base_path_;
 }
 
 }  // namespace extensions