<!DOCTYPE html>

<html>
<head>
    <style>
        #tiled {
            width: 800px;
            height: 1800px;
            background-color: silver;
            -webkit-transform: translateZ(00);
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        function doTest()
        {
            // Force compositing update before changing layer size.
            if (window.internals)
                window.internals.layerTreeAsText(document);

            document.getElementById('tiled').style.height = '2100px';

            if (window.internals)
                document.getElementById('layers').textContent = window.internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES);
        }
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>

    <div id="tiled">Tiled layer</div>
<pre id="layers"></pre>
</body>
</html>