bool PaintLayerScrollableArea::ScrollbarsCanBeActive() const {
  LayoutView* view = GetLayoutBox()->View();
  if (!view)
    return false;

  LocalFrameView* frame_view = view->GetFrameView();
  if (frame_view != frame_view->GetFrame().View())
    return false;

  return !!frame_view->GetFrame().GetDocument();
}

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.