Update {virtual,override,final} for chrome/ to follow C++11 style.

chrome/browser/app_controller_mac_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/files/file_path.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/run_loop.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/testing_profile_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/platform_test.h"
 
 class AppControllerTest : public PlatformTest {
  protected:
   AppControllerTest() {}
 
-  virtual void TearDown() {
+  void TearDown() override {
     TestingBrowserProcess::GetGlobal()->SetProfileManager(NULL);
     base::RunLoop().RunUntilIdle();
   }
 
   content::TestBrowserThreadBundle thread_bundle_;
 };
 
 TEST_F(AppControllerTest, DockMenu) {
   base::scoped_nsobject<AppController> ac([[AppController alloc] init]);
   NSMenu* menu = [ac applicationDockMenu:NSApp];
@@ skipping 27 matching lines @@
   base::scoped_nsobject<AppController> ac([[AppController alloc] init]);
 
   // Delete the active profile.
   manager.profile_manager()->ScheduleProfileForDeletion(
       dest_path1, ProfileManager::CreateCallback());
 
   base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(dest_path2, [ac lastProfile]->GetPath());
 }