Standardize usage of virtual/override/final specifiers.

ash/wm/always_on_top_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_WM_ALWAYS_ON_TOP_CONTROLLER_H_
 #define ASH_WM_ALWAYS_ON_TOP_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/window_observer.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
 
 // AlwaysOnTopController puts window into proper containers based on its
 // 'AlwaysOnTop' property. That is, putting a window into the worskpace
 // container if its "AlwaysOnTop" property is false. Otherwise, put it in
 // |always_on_top_container_|.
 class AlwaysOnTopController : public aura::WindowObserver {
  public:
   AlwaysOnTopController();
-  virtual ~AlwaysOnTopController();
+  ~AlwaysOnTopController() override;
 
   // Sets the container for always on top windows.
   void SetAlwaysOnTopContainer(aura::Window* always_on_top_container);
 
   // Gets container for given |window| based on its "AlwaysOnTop" property.
   aura::Window* GetContainer(aura::Window* window) const;
 
  private:
   // Overridden from aura::WindowObserver:
-  virtual void OnWindowAdded(aura::Window* child) override;
-  virtual void OnWillRemoveWindow(aura::Window* child) override;
-  virtual void OnWindowPropertyChanged(aura::Window* window,
-                                       const void* key,
-                                       intptr_t old) override;
-  virtual void OnWindowDestroyed(aura::Window* window) override;
+  void OnWindowAdded(aura::Window* child) override;
+  void OnWillRemoveWindow(aura::Window* child) override;
+  void OnWindowPropertyChanged(aura::Window* window,
+                               const void* key,
+                               intptr_t old) override;
+  void OnWindowDestroyed(aura::Window* window) override;
 
   aura::Window* always_on_top_container_;
 
   DISALLOW_COPY_AND_ASSIGN(AlwaysOnTopController);
 };
 
 }  // namepsace ash
 
 #endif  // ASH_WM_ALWAYS_ON_TOP_CONTROLLER_H_