chrome: Cleanup class/struct forward declarations

chrome/browser/ui/webui/chromeos/login/oobe_ui.h

 // Copyright (c) 2011 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_UI_WEBUI_CHROMEOS_LOGIN_OOBE_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_OOBE_UI_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 31 matching lines @@
 class ErrorScreenHandler;
 class GaiaScreenHandler;
 class HIDDetectionView;
 class HostPairingScreenActor;
 class KioskAppMenuHandler;
 class KioskAutolaunchScreenActor;
 class KioskEnableScreenActor;
 class LoginScreenContext;
 class NativeWindowDelegate;
 class NetworkDropdownHandler;
-class NetworkErrorView;
 class NetworkStateInformer;
 class NetworkView;
 class SigninScreenHandler;
 class SigninScreenHandlerDelegate;
 class SupervisedUserCreationScreenHandler;
 class ResetView;
 class TermsOfServiceScreenActor;
 class UserBoardScreenHandler;
 class UserBoardView;
 class UserImageView;
@@ skipping 183 matching lines @@
   std::unique_ptr<ShutdownPolicyHandler> shutdown_policy_handler_;
 
   std::unique_ptr<ash::ScreenDimmer> screen_dimmer_;
 
   DISALLOW_COPY_AND_ASSIGN(OobeUI);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_OOBE_UI_H_