<!DOCTYPE html>

<html>
<head>
    <style>
        body {
            overflow: hidden; /* hide body scrollbars */
        }
        .scene {
            position: relative;
            -webkit-perspective: 600px;
            width: 500px;
            height: 300px;
            margin: 50px;
            overflow: hidden;
            border: 1px solid black;
        }
        .container {
            -webkit-transform-style: preserve-3d;
        }
        .tiled {
            position: absolute;
            left: -1250px;
            height: 300px;
            width: 2500px;
            background-color: silver;
            border-right: 300px solid green; /* this should be visible */
            -webkit-transform: rotateY(80deg);
            -webkit-transform-origin: 1500px 50%;
        }
        
        #layers {
            opacity: 0; /* hide from pixel result */
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText(true);

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

<div class="scene">
    <div class="container">
        <div class="tiled"></div>
    </div>
</div>
<pre id="layers">Layer tree goes here</p>

</body>
</html>