Standardize usage of virtual/override/final specifiers.

ui/app_list/views/app_list_menu_views.h

 // 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.
 
 #ifndef UI_APP_LIST_VIEWS_APP_LIST_MENU_VIEWS_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_MENU_VIEWS_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/app_list/app_list_menu.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
 
 namespace gfx {
 class Point;
 }
 
 namespace views {
 class MenuButton;
 }
 
 namespace app_list {
 
 // Views implementation of the app list menu.
 // TODO(benwells): We should consider moving this into Chrome.
 class AppListMenuViews : public AppListMenu {
  public:
   explicit AppListMenuViews(AppListViewDelegate* delegate);
-  virtual ~AppListMenuViews();
+  ~AppListMenuViews() override;
 
   void RunMenuAt(views::MenuButton* button, const gfx::Point& point);
   void Cancel();
 
  private:
   // The context menu itself and its contents.
   scoped_ptr<views::MenuModelAdapter> menu_delegate_;
   views::MenuItemView* menu_;  // Owned by menu_runner_.
   scoped_ptr<views::MenuRunner> menu_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListMenuViews);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_MENU_VIEWS_H_