chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/login/helper.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.
 //
 // This file contains helper functions used by Chromium OS login.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/view.h"
 
-class GURL;
-
 namespace gfx {
 class Rect;
 class Size;
 }  // namespace gfx
 
 namespace content {
 class StoragePartition;
 }
 
 namespace net {
@@ skipping 78 matching lines @@
 // Returns the request context that contains sign-in cookies. For old iframe
 // based flow, the context of the sign-in profile is returned. For webview based
 // flow, the context of the sign-in webview storage partition is returned.
 net::URLRequestContextGetter* GetSigninContext();
 
 }  // namespace login
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_