replace 'virtual ... OVERRIDE' with '... override'

base/json/json_value_serializer_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 <string>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_reader.h"
@@ skipping 354 matching lines @@
   root.reset(JSONReader::Read("/* /* inner */ outer */ [ 1 ]"));
   ASSERT_FALSE(root.get());
 
   // Not a open comment token.
   root.reset(JSONReader::Read("/ * * / [1]"));
   ASSERT_FALSE(root.get());
 }
 
 class JSONFileValueSerializerTest : public testing::Test {
  protected:
-  virtual void SetUp() OVERRIDE {
-    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
-  }
+  void SetUp() override { ASSERT_TRUE(temp_dir_.CreateUniqueTempDir()); }
 
   base::ScopedTempDir temp_dir_;
 };
 
 TEST_F(JSONFileValueSerializerTest, Roundtrip) {
   base::FilePath original_file_path;
   ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &original_file_path));
   original_file_path =
       original_file_path.Append(FILE_PATH_LITERAL("serializer_test.json"));
 
@@ skipping 74 matching lines @@
   ASSERT_TRUE(PathExists(source_file_path));
   JSONFileValueSerializer serializer(source_file_path);
   scoped_ptr<Value> root;
   root.reset(serializer.Deserialize(NULL, NULL));
   ASSERT_TRUE(root.get());
 }
 
 }  // namespace
 
 }  // namespace base