<!DOCTYPE html>

<html>
<head>
    <style>
        body {
            height: 1500px;
            width: 1500px;
        }
        
        .container {
            position: relative;
            height: 200px;
            width: 500px;
            border: 1px solid black;
            overflow: hidden;
            z-index: 0;
        }
        
        .box {
            width: 200px;
            height: 200px;
            background-color: blue;
        }
        
        .composited {
            -webkit-transform: translateZ(1px);
        }
        
        iframe {
            margin: 10px;
        }
        
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        function dumpLayers()
        {
            window.scrollTo(40, 40);
            if (window.internals) {
                // Dump the iframe's layers.
                var iframe = document.getElementById('iframe');
                document.getElementById('layers').innerText = internals.layerTreeAsText(iframe.contentDocument, internals.LAYER_TREE_INCLUDES_VISIBLE_RECTS)
            }
        }
        window.addEventListener('load', dumpLayers, false);
    </script>
</head>
<body>

    <iframe id="iframe" src="resources/subframe-with-layers.html" scrolling="nadso"></iframe>

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