<!DOCTYPE html>
<html>
<head>
    <style>
        #wrap {
            position: absolute;
            width: 400px;
            height: 200px;
            border: 2px solid black;
            left:0;
            top:0;
            -webkit-transform: rotate(0);
        }
        
        #outer {
            position: absolute;
            width:200px;
            height:200px;
            background-color:grey; left:0; top:0;
        }
        
        #inner {
            width: 100px;
            height: 100px;
            background-color:green;
            position: fixed; top:2px;
        }
        
        #outer p {
            margin-left: 110px;
        }
    </style>
</head>
<body>
    <div id='wrap'>
        <div id='outer'>
            <div id='inner'></div>
            <p>Foo</p>
        </div>
    </div>
    <div id="output">Failure</div>    
    <script>
        if (window.testRunner) {
            testRunner.dumpAsText();
        }
        
        function measure() {
            var output = document.getElementById("output");
            if (document.getElementById('inner').offsetLeft >= 200) {
                output.innerHTML = "Success"
            }
            testRunner.notifyDone();
        }
        
        document.getElementById('outer').style.left = '200px';
        measure();
    </script>  
</body>
</html>