[Sync] Replace typedef with using.

components/browser_sync/profile_sync_service.h

 // 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.
 
 #ifndef COMPONENTS_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #define COMPONENTS_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 158 matching lines @@
 class ProfileSyncService : public syncer::SyncServiceBase,
                            public syncer::SyncPrefObserver,
                            public syncer::DataTypeManagerObserver,
                            public syncer::UnrecoverableErrorHandler,
                            public KeyedService,
                            public OAuth2TokenService::Consumer,
                            public OAuth2TokenService::Observer,
                            public SigninManagerBase::Observer,
                            public GaiaCookieManagerService::Observer {
  public:
-  typedef syncer::SyncEngine::Status Status;
-  typedef base::Callback<bool(void)> PlatformSyncAllowedProvider;
+  using Status = syncer::SyncEngine::Status;
+  using PlatformSyncAllowedProvider = base::Callback<bool(void)>;
 
   enum SyncEventCodes {
     MIN_SYNC_EVENT_CODE = 0,
 
     // Events starting the sync service.
     START_FROM_NTP = 1,               // Sync was started from the ad in NTP
     START_FROM_WRENCH = 2,            // Sync was started from the Wrench menu.
     START_FROM_OPTIONS = 3,           // Sync was started from Wrench->Options.
     START_FROM_BOOKMARK_MANAGER = 4,  // Sync was started from Bookmark manager.
     START_FROM_PROFILE_MENU = 5,  // Sync was started from multiprofile menu.
@@ skipping 701 matching lines @@
   base::WeakPtrFactory<ProfileSyncService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 bool ShouldShowActionOnUI(const syncer::SyncProtocolError& error);
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_