Standardize usage of virtual/override/final specifiers.

ash/wm/power_button_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_POWER_BUTTON_CONTROLLER_H_
 #define ASH_WM_POWER_BUTTON_CONTROLLER_H_
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/ash_export.h"
@@ skipping 28 matching lines @@
 // mode.
 class ASH_EXPORT PowerButtonController : ui::EventHandler
 // TODO(derat): Remove these ifdefs after DisplayConfigurator becomes
 // cross-platform.
 #if defined(OS_CHROMEOS)
       , public ui::DisplayConfigurator::Observer
 #endif
       {
  public:
   explicit PowerButtonController(LockStateController* controller);
-  virtual ~PowerButtonController();
+  ~PowerButtonController() override;
 
   void set_has_legacy_power_button_for_test(bool legacy) {
     has_legacy_power_button_ = legacy;
   }
 
   void set_enable_quick_lock_for_test(bool enable_quick_lock) {
     enable_quick_lock_ = enable_quick_lock;
   }
 
   // Called when the current screen brightness changes.
   void OnScreenBrightnessChanged(double percent);
 
   // Called when the power or lock buttons are pressed or released.
   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
 
   // ui::EventHandler:
-  virtual void OnKeyEvent(ui::KeyEvent* event) override;
+  void OnKeyEvent(ui::KeyEvent* event) override;
 
 #if defined(OS_CHROMEOS)
   // Overriden from ui::DisplayConfigurator::Observer:
   virtual void OnDisplayModeChanged(
       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
 #endif
 
  private:
   friend class test::PowerButtonControllerTest;
 
@@ skipping 20 matching lines @@
   bool enable_quick_lock_;
 
   LockStateController* controller_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_