view->GetParent(view);
view = view->GetParent(); else NS_ADDREF(aWidget);
void GetWidgetForView(nsIView *aView, nsIWidget *&aWidget){  aWidget = nsnull;  nsIView *view = aView;  while (!aWidget && view)  {    view->GetWidget(aWidget);    if (!aWidget)      view->GetParent(view);  }}