it = new nsDocumentFragment(mOwnerDocument);
it = new nsDocumentFragment(mOwnerDocument, mInner.mNodeInfo);
nsDocumentFragment::CloneNode(PRBool aDeep, nsIDOMNode** aReturn){  nsDocumentFragment* it;  it = new nsDocumentFragment(mOwnerDocument);  if (nsnull == it) {    return NS_ERROR_OUT_OF_MEMORY;  }//XXX  mInner.CopyInnerTo(this, &it->mInner);  return it->QueryInterface(kIDOMNodeIID, (void**) aReturn);}