<!DOCTYPE html><!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<body style="height: 2000px;">
<pre id="log"></pre>
<div style="position: fixed; width: 100px; height: 100px; background: fixed linear-gradient(to bottom right, red, yellow);">
<script>
if (window.testRunner && window.internals)
    onload = () => { testRunner.dumpAsText(); log.textContent = internals.scrollingStateTreeAsText() };
</script>