chrome: Cleanup class/struct forward declarations

chrome/browser/ui/webui/chromeos/login/core_oobe_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_CORE_OOBE_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_CORE_OOBE_HANDLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 #include "chrome/browser/chromeos/login/screens/core_oobe_actor.h"
 #include "chrome/browser/chromeos/login/version_info_updater.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 #include "chrome/browser/ui/webui/chromeos/login/demo_mode_detector.h"
 #include "ui/events/event_source.h"
 #include "ui/keyboard/scoped_keyboard_disabler.h"
 
 namespace base {
 class ListValue;
 }
 
-namespace gfx {
-class Rect;
-}
-
 namespace ui {
 class EventProcessor;
 }
 
 namespace chromeos {
 
 class HelpAppLauncher;
 class OobeUI;
 
 // The core handler for Javascript messages related to the "oobe" view.
@@ skipping 158 matching lines @@
   DemoModeDetector demo_mode_detector_;
 
   keyboard::ScopedKeyboardDisabler scoped_keyboard_disabler_;
 
   DISALLOW_COPY_AND_ASSIGN(CoreOobeHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_CORE_OOBE_HANDLER_H_