chromium/third_party/blink/web_tests/fast/hidpi/static/popup-menu-with-scrollbar-appearance.html

<!DOCTYPE html>
<html>
<head>
<script src="../../forms/resources/picker-common.js"></script>
</head>
<body>
<p>The scrollbar width should be properly scaled..</p>
<select>
  <option value="001">001</option>
  <option value="002">002</option>
  <option value="003">003</option>
  <option value="004">004</option>
  <option value="005">005</option>
  <option value="006">006</option>
  <option value="007">007</option>
  <option value="008">008</option>
  <option value="009">009</option>
  <option value="010">010</option>
  <option value="011">011</option>
  <option value="012">012</option>
  <option value="013">013</option>
  <option value="014">014</option>
  <option value="015">015</option>
  <option value="016">016</option>
  <option value="017">017</option>
  <option value="018">018</option>
  <option value="019">019</option>
  <option value="020">020</option>
  <option value="021">021</option>
  <option value="022">022</option>
</select>
<p id="description" style="opacity: 0"></p>
<div id="console" style="opacity: 0"></div>
</body>
<script>
  var selector = document.querySelector('select');
  testRunner.waitUntilDone();
  openPicker(selector, function() {
    testRunner.notifyDone();
  },
  function() {
    testRunner.notifyDone();
  });
</script>
</html>