[Sync] Replace typedef with using.

components/sync/model/sync_merge_result_unittest.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/sync/model/sync_merge_result.h"
 
 #include "base/location.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 
 namespace {
 
-typedef testing::Test SyncMergeResultTest;
+using SyncMergeResultTest = testing::Test;
 
 TEST_F(SyncMergeResultTest, Unset) {
   SyncMergeResult merge_result(BOOKMARKS);
   EXPECT_FALSE(merge_result.error().IsSet());
   EXPECT_EQ(0, merge_result.num_items_before_association());
   EXPECT_EQ(0, merge_result.num_items_after_association());
   EXPECT_EQ(0, merge_result.num_items_added());
   EXPECT_EQ(0, merge_result.num_items_deleted());
   EXPECT_EQ(0, merge_result.num_items_modified());
 }
@@ skipping 43 matching lines @@
   SyncMergeResult merge_result(BOOKMARKS);
   EXPECT_EQ(0, merge_result.num_items_modified());
 
   merge_result.set_num_items_modified(10);
   EXPECT_EQ(10, merge_result.num_items_modified());
 }
 
 }  // namespace
 
 }  // namespace syncer