[Sync] Replace typedef with using.

components/browser_sync/profile_sync_service.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 "components/browser_sync/profile_sync_service.h"
 
 #include <stddef.h>
 
 #include <cstddef>
 #include <map>
@@ skipping 98 matching lines @@
 using syncer::ProtocolEventObserver;
 using syncer::SyncEngine;
 using syncer::SyncCredentials;
 using syncer::SyncProtocolError;
 using syncer::WeakHandle;
 
 namespace browser_sync {
 
 namespace {
 
-typedef GoogleServiceAuthError AuthError;
+using AuthError = GoogleServiceAuthError;
 
 const char kSyncUnrecoverableErrorHistogram[] = "Sync.UnrecoverableErrors";
 
 const net::BackoffEntry::Policy kRequestAccessTokenBackoffPolicy = {
     // Number of initial errors (in sequence) to ignore before applying
     // exponential back-off rules.
     0,
 
     // Initial delay for exponential back-off in ms.
     2000,
@@ skipping 2290 matching lines @@
 
   DCHECK(startup_controller_->IsSetupInProgress());
   startup_controller_->SetSetupInProgress(false);
 
   if (IsEngineInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }
 
 }  // namespace browser_sync