content: Cleanup class/struct forward declarations

content/public/browser/quota_permission_context.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 CONTENT_PUBLIC_BROWSER_QUOTA_PERMISSION_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_QUOTA_PERMISSION_CONTEXT_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/common/storage_quota_params.h"
 #include "storage/common/quota/quota_types.h"
 
-class GURL;
-
 namespace content {
 
 class QuotaPermissionContext
     : public base::RefCountedThreadSafe<QuotaPermissionContext> {
  public:
   enum QuotaPermissionResponse {
     QUOTA_PERMISSION_RESPONSE_UNKNOWN,
     QUOTA_PERMISSION_RESPONSE_ALLOW,
     QUOTA_PERMISSION_RESPONSE_DISALLOW,
     QUOTA_PERMISSION_RESPONSE_CANCELLED,
   };
 
   typedef base::Callback<void(QuotaPermissionResponse)> PermissionCallback;
 
   virtual void RequestQuotaPermission(
       const StorageQuotaParams& params,
       int render_process_id,
       const PermissionCallback& callback) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<QuotaPermissionContext>;
   virtual ~QuotaPermissionContext() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_QUOTA_PERMISSION_CONTEXT_H_