chromium/third_party/blink/web_tests/fast/text-autosizing/text-removal.html

<!DOCTYPE html>
<meta name="viewport" content="width=800">
<script src="../../resources/js-test.js"></script>
<script src="resources/autosizingTest.js"></script>
<style>
  html {
    font-size: 16px;
    line-height: 16px;
  }
  body {
    width: 800px;
    margin: 0;
    overflow-y: hidden;
  }
</style>
<span id="span1">
  Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor
  incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
  nostrud exercitation ullamco laboris nisiut aliquip ex ea commodo consequat.
</span>
<span id="span2"></span>
<script>
  var forceLayout1 = document.body.offsetTop;
  var span1 = document.getElementById('span1');
  var span2 = document.getElementById('span2');

  span1.removeChild(span1.firstChild);
  var forceLayout2 = document.body.offsetTop;

  shouldBeEqualToString("window.getComputedStyle(span1).lineHeight", "16px");
  shouldBeEqualToString("window.getComputedStyle(span2).lineHeight", "16px");
</script>