filter-region-html-content-viewport.tentative.html

<!doctype html>
<title>Filter with userSpaceOnUse filterUnits on non-SVG element</title>
<link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#FilterEffectsRegion">
<link rel="match" href="reference/green-100x100.html">
<style>
  #target {
    width: 105px;
    height: 105px;
    background-color: red;
    position: relative;
    border: 10px solid orange;
    filter: url(#f);
  }
  #target > div {
    width: 100px;
    height: 100px;
    background-color: yellow;
    position: absolute;
    top: 50px;
    left: 50px;
 }
</style>
<div id="target">
  <div></div>
</div>
<svg height="0">
  <filter id="f" filterUnits="userSpaceOnUse"
          x="0%" y="0%" width="80%" height="80%">
    <feFlood flood-color="green"/>
  </filter>
</svg>

chromium/third_party/blink/web_tests/external/wpt/css/filter-effects/filter-region-html-content-viewport.tentative.html