ev->mFrame->Instantiate(ev->mContentType.get(), ev->mURI);
nsresult rv = ev->mFrame->Instantiate(ev->mContentType.get(), ev->mURI); if (NS_FAILED(rv)) { con->Fallback(PR_TRUE); }
nsAsyncInstantiateEvent::HandleEvent(PLEvent* event){  nsAsyncInstantiateEvent* ev = NS_STATIC_CAST(nsAsyncInstantiateEvent*,                                               event);  nsObjectLoadingContent* con = NS_STATIC_CAST(nsObjectLoadingContent*,                                               PL_GetEventOwner(event));  // Make sure that we still have the right frame  if (con->GetFrame() == ev->mFrame) {    ev->mFrame->Instantiate(ev->mContentType.get(), ev->mURI);  }  return nsnull;}