Standardize usage of virtual/override/final specifiers.

chrome/test/base/web_ui_browser_test_browsertest.cc

 // Copyright 2014 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/bind.h"
 #include "base/bind_helpers.h"
 #include "base/values.h"
 #include "chrome/common/url_constants.h"
@@ skipping 12 matching lines @@
 // global s_test_ which should point to |this| for the duration of the test run
 // and be cleared afterward.
 class WebUIBrowserExpectFailTest : public WebUIBrowserTest {
  public:
   WebUIBrowserExpectFailTest() {
     EXPECT_FALSE(s_test_);
     s_test_ = this;
   }
 
  protected:
-  virtual ~WebUIBrowserExpectFailTest() {
+  ~WebUIBrowserExpectFailTest() override {
     EXPECT_TRUE(s_test_);
     s_test_ = NULL;
   }
 
   static void RunJavascriptTestNoReturn(const std::string& testname) {
     EXPECT_TRUE(s_test_);
     s_test_->RunJavascriptTest(testname);
   }
 
   static void RunJavascriptAsyncTestNoReturn(const std::string& testname) {
@@ skipping 192 matching lines @@
 // testDone directly and expect pass result.
 IN_PROC_BROWSER_TEST_F(WebUIBrowserAsyncTest, TestTestDoneEarlyPassesAsync) {
   ASSERT_TRUE(RunJavascriptAsyncTest("testDone"));
 }
 
 // Test that calling testDone during RunJavascriptTest still completes when
 // waiting for async result.
 IN_PROC_BROWSER_TEST_F(WebUIBrowserAsyncTest, TestTestDoneEarlyPasses) {
   ASSERT_TRUE(RunJavascriptTest("testDone"));
 }