chromium/third_party/blink/web_tests/fast/text-autosizing/inherited-multiplier.html

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=800">
<style>
  body {
    font-size: 16px;
    margin: 0;
    overflow: hidden;
    width: 800px;
  }
</style>
<script src="resources/autosizingTest.js"></script>
</head>
<body>
<div id="outer">
  This test verifies that a text autosizing multiplier that is inherited from a
  parent element's ComputedStyle is reflected in the computed font size, even if the
  specified font size is different and the next text autosizing pass doesn't alter
  the multiplier.
</div>
<script>
  var outer = document.querySelector('#outer');
  var inner = document.createElement('div');
  inner.innerText = outer.innerText;
  inner.style.fontSize = '12px';
  outer.appendChild(inner);
</script>
</body>
</html>