[Sync] Replace typedef with using.

chrome/browser/sync/test/integration/search_engines_helper.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 CHROME_BROWSER_SYNC_TEST_INTEGRATION_SEARCH_ENGINES_HELPER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_SEARCH_ENGINES_HELPER_H_
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/strings/string16.h"
 #include "chrome/browser/sync/test/integration/await_match_status_change_checker.h"
 
 class Profile;
 class TemplateURL;
 class TemplateURLService;
 
-typedef std::map<std::string, const TemplateURL*> GUIDToTURLMap;
+using GUIDToTURLMap = std::map<std::string, const TemplateURL*>;
 
 namespace search_engines_helper {
 
 // Used to access the search engines within a particular sync profile.
 TemplateURLService* GetServiceForBrowserContext(int profile_index);
 
 // Used to access the search engines within the verifier sync profile.
 TemplateURLService* GetVerifierService();
 
 // Compared a single TemplateURLService for a given profile to the verifier.
@@ skipping 44 matching lines @@
 
 }  // namespace search_engines_helper
 
 // Checker that blocks until all services have the same search engine data.
 class SearchEnginesMatchChecker : public AwaitMatchStatusChangeChecker {
  public:
   SearchEnginesMatchChecker();
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_SEARCH_ENGINES_HELPER_H_