<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <meta name="viewport" content="initial-scale=1.0">
    <style>
        html {
            -webkit-overflow-scrolling: touch;
        }
        .container {
            position: relative;
            z-index: 0;
            border: 20px solid black;
            height: 400px;
            width: 280px;
            overflow: scroll;
        }
        
        .composited {
            -webkit-transform: translateZ(0);
            width: 100%;
            height: 500px;
            background-color: silver;
        }
        
        .container.no-scroll {
            overflow: hidden;
            border: 20px solid red;
        }
    </style>
    <script>
        if (window.testRunner) {
            testRunner.waitUntilDone();
            testRunner.dumpAsText();
        }

        function startTest()
        {
            document.body.offsetWidth;
            window.setTimeout(function() {
                var scroller = document.getElementById('scroller');
                scroller.classList.toggle('no-scroll');

                if (window.internals)
                    document.getElementById('layer-tree').innerText = window.internals.layerTreeAsText(document);

                if (window.testRunner)
                    window.testRunner.notifyDone();
                
            }, 0);
        }
        window.addEventListener('load', startTest, false);
    </script>
</head>
<body>
    
    <div id="scroller" class="container">
        <div class="composited">
        </div>
    </div>
<pre id="layer-tree">Layer tree goes here</pre>

</body>
</html>