Standardize usage of virtual/override/final specifiers.

ash/touch/touch_observer_hud.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_TOUCH_TOUCH_OBSERVER_HUD_H_
 #define ASH_TOUCH_TOUCH_OBSERVER_HUD_H_
 
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
 #include "ui/events/event_handler.h"
@@ skipping 25 matching lines @@
   virtual void Clear();
 
   // Removes the HUD from the screen.
   void Remove();
 
   int64 display_id() const { return display_id_; }
 
  protected:
   explicit TouchObserverHUD(aura::Window* initial_root);
 
-  virtual ~TouchObserverHUD();
+  ~TouchObserverHUD() override;
 
   virtual void SetHudForRootWindowController(
       RootWindowController* controller) = 0;
   virtual void UnsetHudForRootWindowController(
       RootWindowController* controller) = 0;
 
   views::Widget* widget() { return widget_; }
 
   // Overriden from ui::EventHandler.
-  virtual void OnTouchEvent(ui::TouchEvent* event) override;
+  void OnTouchEvent(ui::TouchEvent* event) override;
 
   // Overridden from views::WidgetObserver.
-  virtual void OnWidgetDestroying(views::Widget* widget) override;
+  void OnWidgetDestroying(views::Widget* widget) override;
 
   // Overridden from gfx::DisplayObserver.
-  virtual void OnDisplayAdded(const gfx::Display& new_display) override;
-  virtual void OnDisplayRemoved(const gfx::Display& old_display) override;
-  virtual void OnDisplayMetricsChanged(const gfx::Display& display,
-                                       uint32_t metrics) override;
+  void OnDisplayAdded(const gfx::Display& new_display) override;
+  void OnDisplayRemoved(const gfx::Display& old_display) override;
+  void OnDisplayMetricsChanged(const gfx::Display& display,
+                               uint32_t metrics) override;
 
 #if defined(OS_CHROMEOS)
   // Overriden from ui::DisplayConfigurator::Observer.
   virtual void OnDisplayModeChanged(
       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
 #endif  // defined(OS_CHROMEOS)
 
   // Overriden form DisplayController::Observer.
-  virtual void OnDisplaysInitialized() override;
-  virtual void OnDisplayConfigurationChanging() override;
-  virtual void OnDisplayConfigurationChanged() override;
+  void OnDisplaysInitialized() override;
+  void OnDisplayConfigurationChanging() override;
+  void OnDisplayConfigurationChanged() override;
 
  private:
   friend class TouchHudTestBase;
 
   const int64 display_id_;
   aura::Window* root_window_;
 
   views::Widget* widget_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchObserverHUD);
 };
 
 }  // namespace ash
 
 #endif  // ASH_TOUCH_TOUCH_OBSERVER_HUD_H_