Standardize usage of virtual/override/final specifiers.

chrome/test/base/v8_unit_test.h

 // Copyright (c) 2011 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_TEST_BASE_V8_UNIT_TEST_H_
 #define CHROME_TEST_BASE_V8_UNIT_TEST_H_
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/strings/string_piece.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "v8/include/v8.h"
 
 // A superclass for unit tests that involve running JavaScript.  This class
 // sets up V8 context and has methods that make it easy to execute scripts in
 // this context as well as call functions in the context.
 class V8UnitTest : public testing::Test {
  public:
   V8UnitTest();
-  virtual ~V8UnitTest();
+  ~V8UnitTest() override;
 
   // Methods from testing::Test.
-  virtual void SetUp() override;
+  void SetUp() override;
 
  protected:
   // Add a custom helper JS library for your test. If |library_path| is
   // relative, it'll be read as relative to the test data dir.
   void AddLibrary(const base::FilePath& library_path);
 
   // Runs |test_fixture|.|test_name| using the framework in test_api.js.
   bool RunJavascriptTestF(const std::string& test_fixture,
                           const std::string& test_name);
 
@@ skipping 42 matching lines @@
   v8::HandleScope handle_scope_;
 
   // Context for the JavaScript in the test.
   v8::Persistent<v8::Context> context_;
 
   // User added libraries.
   std::vector<base::FilePath> user_libraries_;
 };
 
 #endif  // CHROME_TEST_BASE_V8_UNIT_TEST_H_