<script>
if (window.testRunner)
    testRunner.dumpAsText();

function test() {
    try {
        var frame = document.getElementById("f");
        var childNode = frame.contentDocument.adoptNode(frame);
    } catch(ex) {
        alert(ex);
    }
}
</script>
<object id="f" onload="test();" data="data:text/html,<body></body>"></object>