[Sync] Replace typedef with using.

chrome/browser/sync/test/integration/migration_test.cc

 // Copyright 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 "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
 #include "chrome/browser/sync/test/integration/migration_waiter.h"
@@ skipping 22 matching lines @@
   return syncer::ModelTypeSet(type);
 }
 
 syncer::ModelTypeSet MakeSet(syncer::ModelType type1,
                              syncer::ModelType type2) {
   return syncer::ModelTypeSet(type1, type2);
 }
 
 // An ordered list of model types sets to migrate.  Used by
 // RunMigrationTest().
-typedef std::deque<syncer::ModelTypeSet> MigrationList;
+using MigrationList = std::deque<syncer::ModelTypeSet>;
 
 // Utility functions to make a MigrationList out of a small number of
 // model types / model type sets.
 
 MigrationList MakeList(syncer::ModelTypeSet model_types) {
   return MigrationList(1, model_types);
 }
 
 MigrationList MakeList(syncer::ModelTypeSet model_types1,
                        syncer::ModelTypeSet model_types2) {
@@ skipping 371 matching lines @@
     // Do not add optional datatypes.
   }
 
   ~MigrationReconfigureTest() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MigrationReconfigureTest);
 };
 
 }  // namespace