Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/page_capture/page_capture_apitest.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 "base/base_switches.h"
 #include "base/command_line.h"
 #include "chrome/browser/extensions/api/page_capture/page_capture_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "net/dns/mock_host_resolver.h"
 
 using extensions::PageCaptureSaveAsMHTMLFunction;
 
 class ExtensionPageCaptureApiTest : public ExtensionApiTest {
  public:
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitchASCII(switches::kJavaScriptFlags, "--expose-gc");
   }
 };
 
 class PageCaptureSaveAsMHTMLDelegate
     : public PageCaptureSaveAsMHTMLFunction::TestDelegate {
  public:
   PageCaptureSaveAsMHTMLDelegate() {
     PageCaptureSaveAsMHTMLFunction::SetTestDelegate(this);
   }
 
   virtual ~PageCaptureSaveAsMHTMLDelegate() {
     PageCaptureSaveAsMHTMLFunction::SetTestDelegate(NULL);
   }
 
-  virtual void OnTemporaryFileCreated(
-      const base::FilePath& temp_file) override {
+  void OnTemporaryFileCreated(const base::FilePath& temp_file) override {
     temp_file_ = temp_file;
   }
 
   base::FilePath temp_file_;
 };
 
 IN_PROC_BROWSER_TEST_F(ExtensionPageCaptureApiTest, SaveAsMHTML) {
   host_resolver()->AddRule("www.a.com", "127.0.0.1");
   ASSERT_TRUE(StartEmbeddedTestServer());
   PageCaptureSaveAsMHTMLDelegate delegate;
   ASSERT_TRUE(RunExtensionTest("page_capture")) << message_;
   ASSERT_FALSE(delegate.temp_file_.empty());
   // Flush the message loops to make sure the delete happens.
   content::RunAllPendingInMessageLoop(content::BrowserThread::FILE);
   content::RunAllPendingInMessageLoop(content::BrowserThread::IO);
   ASSERT_FALSE(base::PathExists(delegate.temp_file_));
 }