chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/login/app_launch_controller.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_LOGIN_APP_LAUNCH_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_APP_LAUNCH_CONTROLLER_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_launch_error.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_profile_loader.h"
 #include "chrome/browser/chromeos/app_mode/startup_app_launcher.h"
 #include "chrome/browser/chromeos/login/app_launch_signin_screen.h"
 #include "chrome/browser/chromeos/login/screens/app_launch_splash_screen_actor.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 namespace chromeos {
 
 class LoginDisplayHost;
 class OobeUI;
-class UserManager;
 
 // Controller for the kiosk app launch process, responsible for
 // coordinating loading the kiosk profile, launching the app, and
 // updating the splash screen UI.
 class AppLaunchController
     : public AppLaunchSplashScreenActor::Delegate,
       public KioskProfileLoader::Delegate,
       public StartupAppLauncher::Delegate,
       public AppLaunchSigninScreen::Delegate,
       public content::NotificationObserver {
@@ skipping 109 matching lines @@
   static base::Closure* network_timeout_callback_;
   static ReturnBoolCallback* can_configure_network_callback_;
   static ReturnBoolCallback* need_owner_auth_to_configure_network_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(AppLaunchController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_APP_LAUNCH_CONTROLLER_H_