Standardize usage of virtual/override/final specifiers.

ash/shelf/shelf_window_watcher_item_delegate.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 ASH_SHELF_SHELF_WINDOW_WATCHER_ITEM_DELEGATE_H_
 #define ASH_SHELF_SHELF_WINDOW_WATCHER_ITEM_DELEGATE_H_
 
 #include "ash/shelf/shelf_item_delegate.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
 class ShelfModel;
 
 // ShelfItemDelegate for the items created by ShelfWindowWatcher.
 class ShelfWindowWatcherItemDelegate : public ShelfItemDelegate {
  public:
   ShelfWindowWatcherItemDelegate(aura::Window* window, ShelfModel* model_);
 
-  virtual ~ShelfWindowWatcherItemDelegate();
+  ~ShelfWindowWatcherItemDelegate() override;
 
  private:
   // ShelfItemDelegate overrides:
-  virtual bool ItemSelected(const ui::Event& event) override;
-  virtual base::string16 GetTitle() override;
-  virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) override;
-  virtual ShelfMenuModel* CreateApplicationMenu(int event_flags) override;
-  virtual bool IsDraggable() override;
-  virtual bool ShouldShowTooltip() override;
-  virtual void Close() override;
+  bool ItemSelected(const ui::Event& event) override;
+  base::string16 GetTitle() override;
+  ui::MenuModel* CreateContextMenu(aura::Window* root_window) override;
+  ShelfMenuModel* CreateApplicationMenu(int event_flags) override;
+  bool IsDraggable() override;
+  bool ShouldShowTooltip() override;
+  void Close() override;
 
   // Stores a Window associated with this item. Not owned.
   aura::Window* window_;
 
   // Not owned.
   ShelfModel* model_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfWindowWatcherItemDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_WINDOW_WATCHER_ITEM_DELEGATE_H_