<!DOCTYPE html>
<html>
<head>
<style>
body {
height: 5000px;
overflow-x: hidden;
}
#transform {
z-index: 0;
/* transform establishes a fixed pos container, so translate to make up for scroll offset so indicator is still underneath overlap */
-webkit-transform:translate3d(0px, 1000px, 0px);
#indicator {
width: 256px;
height: 256px;
background-color: red;
position: fixed;
left: 100px;
top: 100px;
#overlap {
width: 500px;
height: 500px;
background-color: green;
left: 0px;
top: 0px;
</style>
<script>
function doTest() {
window.scrollTo(0, 1000);
if (window.testRunner) {
document.getElementById('layertree').innerText = window.internals.layerTreeAsText(document);
testRunner.dumpAsText(true);
window.addEventListener("load", doTest, false);
</script>
</head>
<body>
<!-- the red indicator should be covered by the green overlap element -->
<div id="transform">
<div id="indicator"></div>
</div>
<div id="overlap"></div>
<pre id="layertree"></pre>
</body>
</html>
