PaintLayerScrollableArea::PreventRelayoutScope::PreventRelayoutScope(
    SubtreeLayoutScope& layout_scope) {
  if (!count_) {
    DCHECK(!layout_scope_);
    DCHECK(NeedsRelayoutList().IsEmpty());
    layout_scope_ = &layout_scope;
  }
  count_++;
}

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.