C++11 override style change for athena

athena/extensions/chrome/athena_extension_install_ui.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_CHROME_ATHENA_EXTENSION_INSTALL_UI_H_
 #define ATHENA_EXTENSIONS_CHROME_ATHENA_EXTENSION_INSTALL_UI_H_
 
 #include "extensions/browser/install/extension_install_ui.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace athena {
 
 class AthenaExtensionInstallUI : public extensions::ExtensionInstallUI {
  public:
   AthenaExtensionInstallUI();
-  virtual ~AthenaExtensionInstallUI();
+  ~AthenaExtensionInstallUI() override;
 
   // ExtensionInstallUI:
-  virtual void OnInstallSuccess(const extensions::Extension* extension,
-                                const SkBitmap* icon) override;
-  virtual void OnInstallFailure(
-      const extensions::CrxInstallerError& error) override;
-  virtual void SetUseAppInstalledBubble(bool use_bubble) override;
-  virtual void OpenAppInstalledUI(const std::string& app_id) override;
-  virtual void SetSkipPostInstallUI(bool skip_ui) override;
-  virtual gfx::NativeWindow GetDefaultInstallDialogParent() override;
+  void OnInstallSuccess(const extensions::Extension* extension,
+                        const SkBitmap* icon) override;
+  void OnInstallFailure(const extensions::CrxInstallerError& error) override;
+  void SetUseAppInstalledBubble(bool use_bubble) override;
+  void OpenAppInstalledUI(const std::string& app_id) override;
+  void SetSkipPostInstallUI(bool skip_ui) override;
+  gfx::NativeWindow GetDefaultInstallDialogParent() override;
 
  private:
   // Whether or not to show the default UI after completing the installation.
   bool skip_post_install_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(AthenaExtensionInstallUI);
 };
 
 }  //  namespace athena
 
 #endif  // ATHENA_EXTENSIONS_CHROME_ATHENA_EXTENSION_INSTALL_UI_H_