<!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true ] -->
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <style>
        body {
            height: 2000px;
        }
        iframe {
            margin-top: 300px;
        }
    </style>
    <script src="../../resources/ui-helper.js"></script>
    <script>
        if (window.testRunner) {
            testRunner.waitUntilDone();
            testRunner.dumpAsText();
        }

        async function doTest()
        {
            await UIHelper.immediateUnstableScrollTo(0, 100);
            await UIHelper.ensurePresentationUpdate();
            
            document.getElementById('layer-tree').textContent = internals.layerTreeAsText(document);
            testRunner.notifyDone();
        }
        
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
<pre id="layer-tree"></pre>
    <iframe srcdoc="
        <style>
            body {
                height: 1000px;
            }
            .fixed {
                position: fixed;
                top: 10px;
            }
            .box {
                width: 200px;
                height: 200px;
                background-color: blue;
            }
        </style>
        <div id='box' class='fixed box'></div>"
    ></iframe>
</body>
</html>