C++11 override style change for athena

athena/main/athena_launcher.cc

 // 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.
 
 #include "athena/main/public/athena_launcher.h"
 
 #include "athena/activity/public/activity_factory.h"
 #include "athena/activity/public/activity_manager.h"
 #include "athena/content/public/app_registry.h"
 #include "athena/content/public/content_activity_factory_creator.h"
@@ skipping 56 matching lines @@
 
 // This class observes the change of the virtual keyboard and distribute the
 // change to appropriate modules of athena.
 // TODO(oshima): move the VK bounds logic to screen manager.
 class VirtualKeyboardObserver : public keyboard::KeyboardControllerObserver {
  public:
   VirtualKeyboardObserver() {
     keyboard::KeyboardController::GetInstance()->AddObserver(this);
   }
 
-  virtual ~VirtualKeyboardObserver() {
+  ~VirtualKeyboardObserver() override {
     keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
   }
 
  private:
   virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override {
     HomeCard::Get()->UpdateVirtualKeyboardBounds(new_bounds);
   }
 
   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardObserver);
 };
@@ skipping 81 matching lines @@
   athena::SystemUI::Shutdown();
   athena::WindowManager::Shutdown();
   athena::ScreenManager::Shutdown();
   athena::InputManager::Shutdown();
   athena::AthenaEnv::Shutdown();
 
   ShutdownAthenaViewsDelegate();
 }
 
 }  // namespace athena