Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/chromeos/login/signin/auth_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/chromeos/login/signin/auth_sync_observer.h"
 
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "chrome/browser/chromeos/login/reauth_stats.h"
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
@@ skipping 29 matching lines @@
     sync_service->AddObserver(this);
 }
 
 void AuthSyncObserver::Shutdown() {
   browser_sync::ProfileSyncService* sync_service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
   if (sync_service)
     sync_service->RemoveObserver(this);
 }
 
-void AuthSyncObserver::OnStateChanged() {
+void AuthSyncObserver::OnStateChanged(syncer::SyncService* sync) {
   DCHECK(user_manager::UserManager::Get()->IsLoggedInAsUserWithGaiaAccount() ||
          user_manager::UserManager::Get()->IsLoggedInAsSupervisedUser());
   browser_sync::ProfileSyncService* sync_service =

[skym, 2017/01/26 23:43:22]

This variable can be replaced by |sync|.

[Steven Holte, 2017/01/27 02:27:19]

Done.

       ProfileSyncServiceFactory::GetForProfile(profile_);
   const user_manager::User* user =
       ProfileHelper::Get()->GetUserByProfile(profile_);
   GoogleServiceAuthError::State state =
       sync_service->GetAuthError().state();
   if (state != GoogleServiceAuthError::NONE &&
       state != GoogleServiceAuthError::CONNECTION_FAILED &&
       state != GoogleServiceAuthError::SERVICE_UNAVAILABLE &&
       state != GoogleServiceAuthError::REQUEST_CANCELED) {
     // Invalidate OAuth2 refresh token to force Gaia sign-in flow. This is
@@ skipping 34 matching lines @@
     }
   }
 }
 
 void AuthSyncObserver::OnSupervisedTokenLoaded(const std::string& token) {
   ChromeUserManager::Get()->GetSupervisedUserManager()->ConfigureSyncWithToken(
       profile_, token);
 }
 
 }  // namespace chromeos