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chromium/third_party/blink/web_tests/external/wpt/html/rendering/replaced-elements/embedded-content-rendering-rules/audio-controls-002.html 

<!DOCTYPE html>
<title>HTML audio with controls via Web APIs</title>
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#embedded-content-rendering-rules">
<link rel="mismatch" href="/common/blank.html">

<audio id="target"></audio>

<script>
  document.body.offsetTop;
  document.getElementById("target").setAttribute("controls", "");
</script>