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chromium/third_party/blink/web_tests/external/wpt/accessibility/crashtests/map-inside-map.html 

<html>
  <script>
    const imgOutsideMap = document.createElement('img');
    imgOutsideMap.className="img-outside-map";
    imgOutsideMap.setAttribute('usemap', '#map2');
    document.documentElement.appendChild(imgOutsideMap);
    const map = document.createElement('map');
    map.setAttribute('name', 'map2');
    document.documentElement.appendChild(map);
    const imgInsideMap = document.createElement('img');
    imgInsideMap.className="img-inside-map";
    imgInsideMap.setAttribute('usemap', '#map2');
    imgInsideMap.style.visibility = 'collapse';
    map.appendChild(imgInsideMap);
  </script>
</html>