replace OVERRIDE and FINAL with override and final in athena/

athena/system/power_button_controller.h

 // Copyright 2014 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 ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_
 #define ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
@@ skipping 30 matching lines @@
     STATE_OTHER
   };
 
   // Shows the shutdown warning dialog.
   void ShowShutdownWarningDialog();
 
   // Requests shutdown.
   void Shutdown();
 
   // chromeos::PowerManagerClient::Observer:
-  virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE;
+  virtual void BrightnessChanged(int level, bool user_initiated) override;
   virtual void PowerButtonEventReceived(
       bool down,
-      const base::TimeTicks& timestamp) OVERRIDE;
+      const base::TimeTicks& timestamp) override;
 
   // |shutdown_warning_message_|'s parent container.
   aura::Window* warning_message_container_;
 
   // Shows a warning that the device is about to be shutdown.
   scoped_ptr<views::Widget> shutdown_warning_message_;
 
   // Whether the screen brightness was reduced to 0%.
   bool brightness_is_zero_;
 
   // The last time at which the screen brightness was 0%.
   base::TimeTicks zero_brightness_end_time_;
 
   State state_;
 
   base::OneShotTimer<PowerButtonController> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_