[Sync] Fix namespaces for the browser_sync component.

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"
 #include "chrome/browser/chromeos/login/users/supervised_user_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/prefs/pref_service.h"
 #include "components/user_manager/user_manager.h"
 #include "components/user_manager/user_type.h"
 #include "content/public/browser/user_metrics.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
 class Profile;
+
+namespace browser_sync {
 class ProfileSyncService;
+}  // namespace browser_sync
 
 namespace chromeos {
 
 AuthSyncObserver::AuthSyncObserver(Profile* profile)
     : profile_(profile) {
 }
 
 AuthSyncObserver::~AuthSyncObserver() {
 }
 
 void AuthSyncObserver::StartObserving() {
-  ProfileSyncService* sync_service =
+  browser_sync::ProfileSyncService* sync_service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
   if (sync_service)
     sync_service->AddObserver(this);
 }
 
 void AuthSyncObserver::Shutdown() {
-  ProfileSyncService* sync_service =
+  browser_sync::ProfileSyncService* sync_service =
       ProfileSyncServiceFactory::GetForProfile(profile_);
   if (sync_service)
     sync_service->RemoveObserver(this);
 }
 
 void AuthSyncObserver::OnStateChanged() {
   DCHECK(user_manager::UserManager::Get()->IsLoggedInAsUserWithGaiaAccount() ||
          user_manager::UserManager::Get()->IsLoggedInAsSupervisedUser());
-  ProfileSyncService* sync_service =
+  browser_sync::ProfileSyncService* sync_service =
       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