Update {virtual,override,final} to follow C++11 style chrome/browser/ui/webui/chromeos.

chrome/browser/ui/webui/chromeos/cryptohome_web_ui_handler.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_WEBUI_CHROMEOS_CRYPTOHOME_WEB_UI_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_CRYPTOHOME_WEB_UI_HANDLER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "chromeos/dbus/dbus_method_call_status.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 namespace base {
 
 class Value;
 
 }  // base
 
 namespace chromeos {
 
 // Class to handle messages from chrome://cryptohome.
 class CryptohomeWebUIHandler : public content::WebUIMessageHandler {
  public:
   CryptohomeWebUIHandler();
 
-  virtual ~CryptohomeWebUIHandler();
+  ~CryptohomeWebUIHandler() override;
 
   // WebUIMessageHandler override.
-  virtual void RegisterMessages() override;
+  void RegisterMessages() override;
 
  private:
   // This method is called from JavaScript.
   void OnPageLoaded(const base::ListValue* args);
 
   void DidGetNSSUtilInfoOnUIThread(bool is_tpm_token_ready);
 
   // Returns a callback to handle Cryptohome property values.
   BoolDBusMethodCallback GetCryptohomeBoolCallback(
       const std::string& destination_id);
 
   // This method is called when Cryptohome D-Bus method call completes.
   void OnCryptohomeBoolProperty(const std::string& destination_id,
                                 DBusMethodCallStatus call_status,
                                 bool value);
 
   // Sets textcontent of the element whose id is |destination_id| to |value|.
   void SetCryptohomeProperty(const std::string& destination_id,
                              const base::Value& value);
 
   base::WeakPtrFactory<CryptohomeWebUIHandler> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(CryptohomeWebUIHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_CRYPTOHOME_WEB_UI_HANDLER_H_