nsIContent* content = aFrame->GetContent();
mContext = aPresContext; mOwner = aFrame;  nsIContent* content = mOwner->GetContent();      aPresContext->EnsureVisible(PR_TRUE);
nsresult nsPluginDOMContextMenuListener::Init(nsObjectFrame *aFrame){  nsIContent* content = aFrame->GetContent();  // Register context menu listener  if (content) {    nsCOMPtr<nsIDOMEventTarget> receiver(do_QueryInterface(content));    if (receiver) {      nsCOMPtr<nsIDOMContextMenuListener> cxMenuListener;      QueryInterface(NS_GET_IID(nsIDOMContextMenuListener), getter_AddRefs(cxMenuListener));      if (cxMenuListener) {        receiver->AddEventListener(NS_LITERAL_STRING("contextmenu"), cxMenuListener, PR_TRUE);        return NS_OK;      }    }  }  return NS_ERROR_NO_INTERFACE;}