chromium/src/third_party/blink/web_tests/fast/forms/select/listbox-scrollbar-incremental-load.html

<p>
    Test for <i><a href="http://bugs.webkit.org/show_bug.cgi?id=13500">http://bugs.webkit.org/show_bug.cgi?id=13500</a>
    REGRESSION: Listbox scrollbar does not reflect actual scrolled position when selected option is added after layout</i>.
</p>
<p>
    The list box should be scrolled all the way down, showing the selected option
    &ldquo;Seven&rdquo;. The scroller should be at the bottom of the scroll bar
    to reflect this.
</p>
<select size="4">
    <option>One</option>
    <option>Two</option>
    <option>Three</option>
    <option>Four</option>
    <script>
        document.body.offsetTop;
        testRunner.waitUntilDone();
        // The selection is updated as a separate task, so wait for two frames
        // to make sure it has run.
        window.requestAnimationFrame(function() {
          window.requestAnimationFrame(function() {
            testRunner.notifyDone();
          });
        });
    </script>
    <option>Five</option>
    <option>Six</option>
    <option selected>Seven</option>
</select>