C++11 override style change for athena

athena/input/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_INPUT_POWER_BUTTON_CONTROLLER_H_
 #define ATHENA_INPUT_POWER_BUTTON_CONTROLLER_H_
 
 #include "athena/input/public/accelerator_manager.h"
 #include "athena/input/public/input_manager.h"
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "chromeos/dbus/power_manager_client.h"
 
 namespace athena {
 
 class PowerButtonController : public chromeos::PowerManagerClient::Observer,
                               public AcceleratorHandler {
  public:
   PowerButtonController();
-  virtual ~PowerButtonController();
+  ~PowerButtonController() override;
 
   void AddPowerButtonObserver(PowerButtonObserver* observer);
   void RemovePowerButtonObserver(PowerButtonObserver* observer);
 
   void InstallAccelerators();
 
   // A timer callabck to notify the long press event.
   int SetPowerButtonTimeoutMsForTest(int timeout);
 
  private:
@@ skipping 16 matching lines @@
   base::TimeTicks zero_brightness_end_time_;
   bool brightness_is_zero_;
   base::OneShotTimer<PowerButtonController> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_INPUT_POWER_BUTTON_CONTROLLER_H_