mFrameLoader->Init(this);  return NS_OK;
rv = mFrameLoader->Init(this); return rv;
nsHTMLIFrameElement::EnsureFrameLoader(){  if (!mParent || !mDocument) {    // If our parent or document are gone, time to destroy the frame loader.    if (mFrameLoader) {      mFrameLoader->Destroy();      mFrameLoader = nsnull;    }    return NS_OK;  } else if (mFrameLoader) {    // If frame loader is there, we just keep it around, cached    return NS_OK;  }  nsresult rv = NS_NewFrameLoader(getter_AddRefs(mFrameLoader));  NS_ENSURE_SUCCESS(rv, rv);  mFrameLoader->Init(this);  return NS_OK;}