chrome: Cleanup class/struct forward declarations

chrome/browser/ui/webui/chromeos/login/network_screen_handler.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_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/chromeos/base/locale_util.h"
 #include "chrome/browser/chromeos/login/screens/network_view.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 #include "ui/base/ime/chromeos/component_extension_ime_manager.h"
 #include "ui/base/ime/chromeos/input_method_manager.h"
 #include "ui/gfx/geometry/point.h"
 
 namespace chromeos {
 
 class CoreOobeActor;
-class IdleDetector;
-class InputEventsBlocker;
 
 // WebUI implementation of NetworkScreenActor. It is used to interact with
 // the welcome screen (part of the page) of the OOBE.
 class NetworkScreenHandler : public NetworkView, public BaseScreenHandler {
  public:
   explicit NetworkScreenHandler(CoreOobeActor* core_oobe_actor);
   ~NetworkScreenHandler() override;
 
  private:
   // NetworkView implementation:
@@ skipping 27 matching lines @@
 
   // Position of the network control.
   gfx::Point network_control_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_