RDFXMLDataSourceImpl::OnDataAvailable(nsIChannel *channel,
RDFXMLDataSourceImpl::OnDataAvailable(nsIRequest *request,
RDFXMLDataSourceImpl::OnDataAvailable(nsIChannel *channel,                                      nsISupports *ctxt,                                      nsIInputStream *inStr,                                      PRUint32 sourceOffset,                                      PRUint32 count){    return mParser->OnDataAvailable(channel, ctxt, inStr, sourceOffset, count);}