C++11 override style change for athena

athena/extensions/shell/shell_search_controller_factory.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_EXTENSIONS_SHELL_SHELL_SEARCH_CONTROLLER_FACTORY_H_
 #define ATHENA_EXTENSIONS_SHELL_SHELL_SEARCH_CONTROLLER_FACTORY_H_
 
 #include "athena/home/public/search_controller_factory.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace athena {
 
 class ShellSearchControllerFactory : public SearchControllerFactory {
  public:
   explicit ShellSearchControllerFactory(
       content::BrowserContext* browser_context);
-  virtual ~ShellSearchControllerFactory();
+  ~ShellSearchControllerFactory() override;
 
-  virtual scoped_ptr<app_list::SearchController> Create(
+  scoped_ptr<app_list::SearchController> Create(
       app_list::SearchBoxModel* search_box,
       app_list::AppListModel::SearchResults* results) override;
 
  private:
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSearchControllerFactory);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_EXTENSIONS_SHELL_SHELL_SEARCH_CONTROLLER_FACTORY_H_