<!DOCTYPE html>
<html>
<head>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        function dumpLayers()
        {
            var layersResult = document.getElementById('layers');
            if (window.testRunner)
                layersResult.innerText = window.internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES);
        }

        window.addEventListener('load', dumpLayers, false)
    </script>
</head>
<body style="overflow:hidden">
<pre id="layers">Layer tree goes here in DRT</pre>
<div style="position:absolute; left:0.75px; top: 2000.25px; overflow:hidden">
  <div style="transform: translate(-1px);">
    <div style="width:3000px; height: 3000px; background-color:blue">Offscreen, but large, content</div>
    <div style="transform: translateZ(1px); width: 100px; height: 100px"></div>
  </div>
</div>

</body>
</html>