chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/login/screens/core_oobe_actor.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_SCREENS_CORE_OOBE_ACTOR_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_CORE_OOBE_ACTOR_H_
 
 #include <string>
 
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 
 namespace base {
 class DictionaryValue;
 }
 
-namespace gfx {
-class Rect;
-}
-
 namespace chromeos {
 
 class CoreOobeActor {
  public:
   virtual ~CoreOobeActor() {}
 
   virtual void ShowSignInError(int login_attempts,
                                const std::string& error_text,
                                const std::string& help_link_text,
                                HelpAppLauncher::HelpTopic help_topic_id) = 0;
@@ skipping 15 matching lines @@
   virtual void ShowDeviceResetScreen() = 0;
   virtual void ShowEnableDebuggingScreen() = 0;
   virtual void InitDemoModeDetection() = 0;
   virtual void StopDemoModeDetection() = 0;
   virtual void UpdateKeyboardState() = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_CORE_OOBE_ACTOR_H_