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

chrome/browser/chromeos/app_mode/kiosk_profile_loader.h

 // Copyright 2013 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_CHROMEOS_APP_MODE_KIOSK_PROFILE_LOADER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_PROFILE_LOADER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 19 matching lines @@
     virtual void OnProfileLoadFailed(KioskAppLaunchError::Error error) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
   KioskProfileLoader(const std::string& app_user_id,
                      bool use_guest_mount,
                      Delegate* delegate);
 
-  virtual ~KioskProfileLoader();
+  ~KioskProfileLoader() override;
 
   // Starts profile load. Calls delegate on success or failure.
   void Start();
 
  private:
   class CryptohomedChecker;
 
   void LoginAsKioskAccount();
   void ReportLaunchResult(KioskAppLaunchError::Error error);
 
-  // LoginPerformer::Delegate overrides
-  virtual void OnAuthSuccess(const UserContext& user_context) override;
-  virtual void OnAuthFailure(const AuthFailure& error) override;
-  virtual void WhiteListCheckFailed(const std::string& email) override;
-  virtual void PolicyLoadFailed() override;
-  virtual void OnOnlineChecked(
-      const std::string& email, bool success) override;
+  // LoginPerformer::Delegate overrides:
+  void OnAuthSuccess(const UserContext& user_context) override;
+  void OnAuthFailure(const AuthFailure& error) override;
+  void WhiteListCheckFailed(const std::string& email) override;
+  void PolicyLoadFailed() override;
+  void OnOnlineChecked(const std::string& email, bool success) override;
 
   // LoginUtils::Delegate implementation:
-  virtual void OnProfilePrepared(Profile* profile,
-                                 bool browser_launched) override;
+  void OnProfilePrepared(Profile* profile, bool browser_launched) override;
 
   std::string user_id_;
   bool use_guest_mount_;
   Delegate* delegate_;
   scoped_ptr<CryptohomedChecker> cryptohomed_checker_;
   scoped_ptr<LoginPerformer> login_performer_;
 
   DISALLOW_COPY_AND_ASSIGN(KioskProfileLoader);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_PROFILE_LOADER_H_