chromium/content/test/data/accessibility/aria/role-change-delay.html

<!--
@WAIT-FOR:done
-->
<div id="tablist">tab list</div>
<script>
setTimeout(() => {
  document.querySelector('#tablist').setAttribute('role', 'tablist');
  setTimeout(() => {
    document.title = 'done';
  }, 50);
}, 50);
</script>