[Sync] Replace typedef with using.

components/sync/engine_impl/attachments/attachment_uploader_impl.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 "components/sync/engine_impl/attachments/attachment_uploader_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 74 matching lines @@
   void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   // OAuth2TokenService::Consumer.
   void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
                          const std::string& access_token,
                          const base::Time& expiration_time) override;
   void OnGetTokenFailure(const OAuth2TokenService::Request* request,
                          const GoogleServiceAuthError& error) override;
 
  private:
-  typedef std::vector<UploadCallback> UploadCallbackList;
+  using UploadCallbackList = std::vector<UploadCallback>;
 
   void GetToken();
 
   void StopAndReportResult(const UploadResult& result,
                            const AttachmentId& attachment_id);
 
   bool is_stopped_;
   GURL upload_url_;
   const scoped_refptr<net::URLRequestContextGetter>&
       url_request_context_getter_;
@@ skipping 285 matching lines @@
       "%s: %s", kSyncStoreBirthday, encoded_store_birthday.c_str()));
 
   // Use field number to pass ModelType because it's stable and we have server
   // code to decode it.
   const int field_number = GetSpecificsFieldNumberFromModelType(model_type);
   fetcher->AddExtraRequestHeader(
       base::StringPrintf("%s: %d", kSyncDataTypeId, field_number));
 }
 
 }  // namespace syncer