uri->GetPath(str);
doc->GetDocumentURL()->GetPath(str);
FlushSkinXBL(const nsACString& key, nsCOMPtr<nsIXBLDocumentInfo>& aDocInfo, void* aClosure){  nsCOMPtr<nsIDocument> doc;  aDocInfo->GetDocument(getter_AddRefs(doc));  nsCOMPtr<nsIURI> uri;  doc->GetDocumentURL(getter_AddRefs(uri));  nsCAutoString str;  uri->GetPath(str);  PLDHashOperator ret = PL_DHASH_NEXT;  if (!strncmp(str.get(), "/skin", 5)) {    ret = PL_DHASH_REMOVE;  }  return ret;}