Cleanup: Remove unneeded forward declarations from chrome/browser/chromeos.

chrome/browser/chromeos/login/registration_screen.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_CHROMEOS_LOGIN_REGISTRATION_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_REGISTRATION_SCREEN_H_
 #pragma once
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/login/screen_observer.h"
 #include "chrome/browser/chromeos/login/view_screen.h"
 #include "chrome/browser/chromeos/login/web_page_screen.h"
 #include "chrome/browser/chromeos/login/web_page_view.h"
 
+class GURL;
+class Profile;
+
 namespace net {
 class URLRequest;
 class URLRequestJob;
 }  // namespace net
 
-class GURL;
-class Profile;
-class SiteContents;
-
 namespace chromeos {
 
 class ViewScreenDelegate;
 
 // Class that renders host registration page.
 class RegistrationDomView : public WebPageDomView {
  public:
   RegistrationDomView() {}
 
  protected:
@@ skipping 66 matching lines @@
 
   // Url of account creation page. Overriden by tests.
   static scoped_ptr<GURL> host_page_url_;
 
   DISALLOW_COPY_AND_ASSIGN(RegistrationScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_REGISTRATION_SCREEN_H_