Move UserContext to its own file

chrome/browser/chromeos/login/existing_user_controller.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_CHROMEOS_LOGIN_EXISTING_USER_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_EXISTING_USER_CONTROLLER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 14 matching lines @@
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/gfx/rect.h"
 #include "url/gurl.h"
 
 namespace chromeos {
 
 class CrosSettings;
 class LoginDisplayHost;
+class UserContext;
 
 namespace login {
 class NetworkStateHelper;
 }
 
 // ExistingUserController is used to handle login when someone has
 // already logged into the machine.
 // To use ExistingUserController create an instance of it and invoke Init.
 // When Init is called it creates LoginDisplay instance which encapsulates
 // all login UI implementation.
@@ skipping 267 matching lines @@
       local_account_auto_login_delay_subscription_;
 
   FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerTest, ExistingUserLogin);
 
   DISALLOW_COPY_AND_ASSIGN(ExistingUserController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_EXISTING_USER_CONTROLLER_H_