<!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true ] -->

<html>
<head>
    <meta name="viewport" content="initial-scale=1.0">
    <style>
        body {
            height: 5000px;
            margin: 0;
        }
        
        .fixed {
            position: fixed;
            top: 0;
            left: 10px;
            height: 100%;
            width: 100px;
            background-color: blue;
        }
    </style>
    <script>
        if (window.testRunner) {
            testRunner.waitUntilDone();
            testRunner.dumpAsText();
        }

        function getUnstableScrollScript(x, y)
        {
            return `(function() {
                uiController.stableStateOverride = false;
                uiController.immediateZoomToScale(3);
                uiController.immediateScrollToOffset(0, 3000);
                
                uiController.doAfterPresentationUpdate(function() {
                    uiController.uiScriptComplete();
                });
                
            })();`;
        }

        function doTest()
        {
            if (!testRunner.runUIScript)
                return

            testRunner.runUIScript(getUnstableScrollScript(), function() {
                document.getElementById('layers').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_VISIBLE_RECTS);
                testRunner.notifyDone();
            });
        }
        
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
<div class="fixed">fixed</div>
<pre id="layers"></pre>
</body>
</html>