Standardize usage of virtual/override/final specifiers.

ash/desktop_background/desktop_background_widget_controller.h

 // Copyright (c) 2012 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_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_WIDGET_CONTROLLER_H_
 #define ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_WIDGET_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_observer.h"
 
 namespace ash {
 class RootWindowController;
 
 // This class implements a widget-based wallpaper.
 // DesktopBackgroundWidgetController is owned by RootWindowController.
 // When the animation completes the old DesktopBackgroundWidgetController is
 // destroyed. Exported for tests.
 class ASH_EXPORT DesktopBackgroundWidgetController
     : public views::WidgetObserver {
  public:
   // Create
   explicit DesktopBackgroundWidgetController(views::Widget* widget);
 
-  virtual ~DesktopBackgroundWidgetController();
+  ~DesktopBackgroundWidgetController() override;
 
   // Overridden from views::WidgetObserver.
-  virtual void OnWidgetDestroying(views::Widget* widget) override;
+  void OnWidgetDestroying(views::Widget* widget) override;
 
   // Set bounds of component that draws background.
   void SetBounds(gfx::Rect bounds);
 
   // Move component from |src_container| in |root_window| to |dest_container|.
   // It is required for lock screen, when we need to move background so that
   // it hides user's windows. Returns true if there was something to reparent.
   bool Reparent(aura::Window* root_window,
                 int src_container,
                 int dest_container);
@@ skipping 42 matching lines @@
 
  private:
   scoped_ptr<DesktopBackgroundWidgetController> controller_;
 
   DISALLOW_COPY_AND_ASSIGN(AnimatingDesktopController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_WIDGET_CONTROLLER_H_