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

chrome/browser/ui/app_list/app_list_service_mac_interactive_uitest.mm

 // Copyright 2013 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 "chrome/browser/ui/app_list/app_list_service_mac.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "chrome/browser/apps/app_shim/app_shim_handler_mac.h"
@@ skipping 32 matching lines @@
                      apps::APP_SHIM_LAUNCH_NORMAL,
                      std::vector<base::FilePath>());
   }
 
   AppListViewController* GetViewController() {
     return [test::AppListServiceMacTestApi::window_controller()
         appListViewController];
   }
 
   // testing::Test overrides:
-  virtual void TearDown() override {
+  void TearDown() override {
     // At tear-down, NOTIFICATION_APP_TERMINATING should have been sent for the
     // browser shutdown. References to browser-owned objects must be removed
     // from the app list UI.
     AppListViewController* view_controller = GetViewController();
     // Note this first check will fail if the test doesn't ever show the
     // app list, but currently all tests in this file do.
     EXPECT_TRUE(view_controller);
     EXPECT_FALSE([view_controller delegate]);
   }
 
@@ skipping 56 matching lines @@
   EXPECT_TRUE(service->IsAppListVisible());
   EXPECT_EQ(3, launch_count_);
   service->DismissAppList();
   EXPECT_FALSE(service->IsAppListVisible());
 
   // View sticks around until shutdown.
   AppListViewController* view_controller = GetViewController();
   EXPECT_TRUE(view_controller);
   EXPECT_TRUE([view_controller delegate]);
 }