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

chrome/browser/chromeos/app_mode/startup_app_launcher.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_STARTUP_APP_LAUNCHER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_STARTUP_APP_LAUNCHER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 42 matching lines @@
 
    protected:
     virtual ~Delegate() {}
   };
 
   StartupAppLauncher(Profile* profile,
                      const std::string& app_id,
                      bool diagnostic_mode,
                      Delegate* delegate);
 
-  virtual ~StartupAppLauncher();
+  ~StartupAppLauncher() override;
 
   // Prepares the environment for an app launch.
   void Initialize();
 
   // Continues the initialization after network is ready.
   void ContinueWithNetworkReady();
 
   // Launches the app after the initialization is successful.
   void LaunchApp();
 
@@ skipping 19 matching lines @@
   void MaybeInitializeNetwork();
   void MaybeLaunchApp();
 
   void StartLoadingOAuthFile();
   static void LoadOAuthFileOnBlockingPool(KioskOAuthParams* auth_params);
   void OnOAuthFileLoaded(KioskOAuthParams* auth_params);
 
   void OnKioskAppDataLoadStatusChanged(const std::string& app_id);
 
   // OAuth2TokenService::Observer overrides.
-  virtual void OnRefreshTokenAvailable(const std::string& account_id) override;
-  virtual void OnRefreshTokensLoaded() override;
+  void OnRefreshTokenAvailable(const std::string& account_id) override;
+  void OnRefreshTokensLoaded() override;
 
   // extensions::InstallObserver overrides.
-  virtual void OnFinishCrxInstall(const std::string& extension_id,
-                                  bool success) override;
+  void OnFinishCrxInstall(const std::string& extension_id,
+                          bool success) override;
 
   // KioskAppManagerObserver overrides.
-  virtual void OnKioskExtensionLoadedInCache(
-      const std::string& app_id) override;
-  virtual void OnKioskExtensionDownloadFailed(
-      const std::string& app_id) override;
+  void OnKioskExtensionLoadedInCache(const std::string& app_id) override;
+  void OnKioskExtensionDownloadFailed(const std::string& app_id) override;
 
   Profile* profile_;
   const std::string app_id_;
   const bool diagnostic_mode_;
   Delegate* delegate_;
   bool network_ready_handled_;
   int launch_attempt_;
   bool ready_to_launch_;
   bool wait_for_crx_update_;
 
   KioskOAuthParams auth_params_;
 
   DISALLOW_COPY_AND_ASSIGN(StartupAppLauncher);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_STARTUP_APP_LAUNCHER_H_