C++11 override style change for athena

athena/extensions/public/extension_app_model_builder.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_PUBLIC_EXTENSION_APP_MODEL_BUILDER_H_
 #define ATHENA_EXTENSIONS_PUBLIC_EXTENSION_APP_MODEL_BUILDER_H_
 
 #include "athena/home/public/app_model_builder.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "extensions/browser/extension_registry_observer.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 class Extension;
 }
 
 namespace athena {
 
 class ATHENA_EXPORT ExtensionAppModelBuilder
     : public AppModelBuilder,
       public extensions::ExtensionRegistryObserver {
  public:
   explicit ExtensionAppModelBuilder(content::BrowserContext* browser_context);
-  virtual ~ExtensionAppModelBuilder();
+  ~ExtensionAppModelBuilder() override;
 
-  virtual void RegisterAppListModel(app_list::AppListModel* model) override;
+  void RegisterAppListModel(app_list::AppListModel* model) override;
 
  private:
   void AddItem(scoped_refptr<const extensions::Extension> extension);
 
   // extensions::ExtensionRegistryObserver:
-  virtual void OnExtensionInstalled(content::BrowserContext* browser_context,
+  void OnExtensionInstalled(content::BrowserContext* browser_context,
                                     const extensions::Extension* extension,
                                     bool is_update) override;
-  virtual void OnExtensionUninstalled(
+  void OnExtensionUninstalled(
       content::BrowserContext* browser_context,
       const extensions::Extension* extension,
       extensions::UninstallReason reason) override;
 
   content::BrowserContext* browser_context_;
 
   // Unowned pointer to the app list model.
   app_list::AppListModel* model_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAppModelBuilder);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_EXTENSIONS_PUBLIC_EXTENSION_APP_MODEL_BUILDER_H_