int PaintLayerScrollableArea::PageStep(ScrollbarOrientation orientation) const {
  IntSize snapport_size = VisibleScrollSnapportRect().PixelSnappedSize();
  int length = (orientation == kHorizontalScrollbar) ? snapport_size.Width()
                                                     : snapport_size.Height();
  int min_page_step = static_cast<float>(length) *
                      ScrollableArea::MinFractionToStepWhenPaging();
  int page_step = max(min_page_step, length - MaxOverlapBetweenPages());
  return max(page_step, 1);
}

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.