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

chrome/browser/chromeos/login/app_launch_controller.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/app_launch_controller.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
@@ skipping 58 matching lines @@
     if (!window_registry_->GetAppWindowsForApp(app_id).empty()) {
       base::MessageLoop::current()->PostTask(
           FROM_HERE,
           base::Bind(&AppWindowWatcher::NotifyAppWindowCreated,
                      weak_factory_.GetWeakPtr()));
       return;
     } else {
       window_registry_->AddObserver(this);
     }
   }
-  virtual ~AppWindowWatcher() {
-    window_registry_->RemoveObserver(this);
-  }
+  ~AppWindowWatcher() override { window_registry_->RemoveObserver(this); }
 
  private:
   // extensions::AppWindowRegistry::Observer overrides:
-  virtual void OnAppWindowAdded(extensions::AppWindow* app_window) override {
+  void OnAppWindowAdded(extensions::AppWindow* app_window) override {
     if (app_window->extension_id() == app_id_) {
       window_registry_->RemoveObserver(this);
       NotifyAppWindowCreated();
     }
   }
 
   void NotifyAppWindowCreated() {
     controller_->OnAppWindowCreated();
   }
 
@@ skipping 324 matching lines @@
   KioskAppLaunchError::Save(error);
   chrome::AttemptUserExit();
   CleanUp();
 }
 
 bool AppLaunchController::IsShowingNetworkConfigScreen() {
   return network_config_requested_;
 }
 
 }   // namespace chromeos