<!DOCTYPE html>

<html>
<head>
    <script>
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
        }

        function doTest()
        {
            if (!window.internals)
                return;

            document.body.style.backgroundColor = "black";

            // The RenderView's background color should be black.
            document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES) + "\n\n";

            document.body.style.backgroundColor = "red";

            // The RenderView's background color should be red.
            document.getElementById('layers').innerText += internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES);

            testRunner.notifyDone();
        }
        window.addEventListener('load', doTest, false);
    </script>
</head>

<body>
<pre id="layers">Layer tree goes here</p>
</body>
</html>