chromium/third_party/blink/web_tests/fast/multicol/dynamic/remove-content-from-scrollable.html

<!DOCTYPE html>
<script src="../../../resources/check-layout.js"></script>
<p>Test that overflow is recalculated when multicol contents changes.</p>
<p>There should be no scrollbars on this page.</p>
<div id="multicol" style="-webkit-columns:2; column-fill:auto; overflow:auto; width:100px; height:100px;" data-expected-scroll-width="100">
    <div id="filler" style="height:300px;"></div>

    <!-- Need something more in here, or the column set would get nuked along with #filler when
         it's removed: -->
    <div></div>
</div>
<script>
    document.body.offsetTop;
    document.getElementById("filler").style.display = "none";
    checkLayout("#multicol");
</script>