Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/sync/sync_startup_tracker.cc

 // Copyright (c) 2013 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/sync/sync_startup_tracker.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "components/browser_sync/profile_sync_service.h"
 
 SyncStartupTracker::SyncStartupTracker(Profile* profile, Observer* observer)
     : profile_(profile),
       observer_(observer) {
   browser_sync::ProfileSyncService* service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
   if (service)
     service->AddObserver(this);
 
   CheckServiceState();
 }
 
 SyncStartupTracker::~SyncStartupTracker() {
   browser_sync::ProfileSyncService* service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
   if (service)
     service->RemoveObserver(this);
 }
 
-void SyncStartupTracker::OnStateChanged() {
+void SyncStartupTracker::OnStateChanged(syncer::SyncService* sync) {
   CheckServiceState();
 }
 
 void SyncStartupTracker::CheckServiceState() {
   // Note: the observer may free this object so it is not allowed to access
   // this object after invoking the observer callback below.
   switch (GetSyncServiceState(profile_)) {
     case SYNC_STARTUP_ERROR:
       observer_->SyncStartupFailed();
       break;
@@ skipping 33 matching lines @@
   // to be fetched, exit.
   if (!service->waiting_for_auth() &&
       service->GetAuthError().state() != GoogleServiceAuthError::NONE) {
     return SYNC_STARTUP_ERROR;
   }
 
   // No error detected yet, but the sync engine hasn't started up yet, so
   // we're in the pending state.
   return SYNC_STARTUP_PENDING;
 }