C++11 override style change for athena

athena/main/athena_views_delegate.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/athena_views_delegate.h"
 
 #include "athena/main/athena_frame_view.h"
 #include "athena/screen/public/screen_manager.h"
 #include "ui/views/views_delegate.h"
 
 namespace athena {
 
 namespace {
 
 class AthenaViewsDelegate: public views::ViewsDelegate {
  public:
   AthenaViewsDelegate() {
   }
 
-  virtual ~AthenaViewsDelegate() {
-  }
+  ~AthenaViewsDelegate() override {}
 
   virtual void OnBeforeWidgetInit(
       views::Widget::InitParams* params,
       views::internal::NativeWidgetDelegate* delegate) override {
     params->context = athena::ScreenManager::Get()->GetContext();
   }
 
   virtual views::NonClientFrameView* CreateDefaultNonClientFrameView(
       views::Widget* widget) override {
     return new AthenaFrameView(widget);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AthenaViewsDelegate);
 };
 
 }  // namespace
 
 void CreateAthenaViewsDelegate() {
   views::ViewsDelegate::views_delegate = new AthenaViewsDelegate;
 }
 
 void ShutdownAthenaViewsDelegate() {
   CHECK(views::ViewsDelegate::views_delegate);
   delete views::ViewsDelegate::views_delegate;
   views::ViewsDelegate::views_delegate = nullptr;
 }
 
 }  // namespace athena