if (!mURL) { return NS_OK;
if (mOriginalURLSpec) {   *aURI = nsCRT::strdup(mOriginalURLSpec); if (! *aURI) return NS_ERROR_OUT_OF_MEMORY;
RDFXMLDataSourceImpl::GetURI(char* *aURI){    *aURI = nsnull;    if (!mURL) {        return NS_OK;    }        nsCAutoString spec;    mURL->GetSpec(spec);    *aURI = ToNewCString(spec);    if (!*aURI) {        return NS_ERROR_OUT_OF_MEMORY;    }        return NS_OK;}