Standardize usage of virtual/override/final specifiers in sync/.

sync/engine/syncer_proto_util_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 "sync/engine/syncer_proto_util.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 166 matching lines @@
   two_name_response.set_name(oxyphen);
   two_name_response.set_non_unique_name(neuro);
 
   const std::string name_a =
       SyncerProtoUtil::NameFromSyncEntity(two_name_entity);
   EXPECT_EQ(neuro, name_a);
 }
 
 class SyncerProtoUtilTest : public testing::Test {
  public:
-  virtual void SetUp() {
-    dir_maker_.SetUp();
-  }
+  void SetUp() override { dir_maker_.SetUp(); }
 
-  virtual void TearDown() {
-    dir_maker_.TearDown();
-  }
+  void TearDown() override { dir_maker_.TearDown(); }
 
   syncable::Directory* directory() {
     return dir_maker_.directory();
   }
 
  protected:
   base::MessageLoop message_loop_;
   TestDirectorySetterUpper dir_maker_;
 };
 
@@ skipping 98 matching lines @@
   dcm.set_send_error(false);
   EXPECT_TRUE(SyncerProtoUtil::PostAndProcessHeaders(&dcm, NULL,
       msg, &response));
 
   dcm.set_access_denied(true);
   EXPECT_FALSE(SyncerProtoUtil::PostAndProcessHeaders(&dcm, NULL,
       msg, &response));
 }
 
 }  // namespace syncer