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

            // "Expose" the bottom 200px of the view.
            if (window.internals)
                internals.setViewExposedRect(0, 2300, 800, 200);

            testRunner.setViewSize(800, 2500);
            testRunner.waitUntilDone();
        }

        function doTest()
        {
            window.setTimeout(function() {
                scrollTo(0, 5000);

                if (window.internals)
                    document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES);

                if (window.testRunner)
                    testRunner.notifyDone();
            }, 0);
        }

        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
<pre id="layers">Layer tree goes here</p>
<div style='height: 5000px;'></div>
</body>
</html>