Standardize usage of virtual/override/final specifiers.

ash/shell/window_watcher_shelf_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_SHELL_WINDOW_WATCHER_SHELF_ITEM_DELEGATE_H_
 #define ASH_SHELL_WINDOW_WATCHER_SHELF_ITEM_DELEGATE_H_
 
 #include "ash/shelf/shelf_item_delegate.h"
 #include "ash/shelf/shelf_item_types.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 namespace shell {
 
 class WindowWatcher;
 
 // ShelfItemDelegate implementation used by WindowWatcher.
 class WindowWatcherShelfItemDelegate : public ShelfItemDelegate {
  public:
   WindowWatcherShelfItemDelegate(ShelfID id, WindowWatcher* watcher);
-  virtual ~WindowWatcherShelfItemDelegate();
+  ~WindowWatcherShelfItemDelegate() override;
 
   // ShelfItemDelegate:
-  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;
 
  private:
   ShelfID id_;
   WindowWatcher* watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowWatcherShelfItemDelegate);
 };
 
 }  // namespace shell
 }  // namespace ash
 
 #endif  // ASH_SHELL_WINDOW_WATCHER_SHELF_ITEM_DELEGATE_H_