Factor out delivery of throttled progress event.

Source/core/xml/XMLHttpRequest.h

 /*
  *  Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@nypop.com>
  *  Copyright (C) 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
@@ skipping 169 matching lines @@
     bool internalAbort(DropProtection = DropProtectionSync);
     // Clears variables holding response header and body data.
     void clearResponse();
     void clearRequest();
 
     void createRequest(ExceptionState&);
 
     // Dispatches an event of the specified type to m_upload and
     // m_progressEventThrottle.
     void dispatchEventAndLoadEnd(const AtomicString&);
+
+    void dispatchThrottledProgressEvent();
+
     // Does clean up common for all kind of didFail() call.
     void handleDidFailGeneric();
     // Handles didFail() call not caused by cancellation or timeout.
     void handleNetworkError();
     // Handles didFail() call triggered by m_loader->cancel().
     void handleDidCancel();
     // Handles didFail() call for timeout.
     void handleDidTimeout();
 
     OwnPtr<XMLHttpRequestUpload> m_upload;
@@ skipping 47 matching lines @@
 
     // An enum corresponding to the allowed string values for the responseType attribute.
     ResponseTypeCode m_responseTypeCode;
     AsyncMethodRunner<XMLHttpRequest> m_dropProtectionRunner;
     RefPtr<SecurityOrigin> m_securityOrigin;
 };
 
 } // namespace WebCore
 
 #endif // XMLHttpRequest_h