void PaintLayerScrollableArea::WillRemoveScrollbar(
    Scrollbar& scrollbar,
    ScrollbarOrientation orientation) {
  if (!scrollbar.IsCustomScrollbar() &&
      !(orientation == kHorizontalScrollbar ? LayerForHorizontalScrollbar()
                                            : LayerForVerticalScrollbar())) {
    ObjectPaintInvalidator(*GetLayoutBox())
        .SlowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(
            scrollbar, PaintInvalidationReason::kScrollControl);
  }

  ScrollableArea::WillRemoveScrollbar(scrollbar, orientation);
}

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.