<title>Unfortunately not 100% repro.</title>
<body onload="runTests()">
    <div id="foobar">
        <iframe style="width: 90%" src="data:text/html,<body style='width: 80%'>PASS if no crash</body>"></iframe>
    </div>
</body>
<script>
if (window.testRunner)
    testRunner.dumpAsText();

function runTests() {
    setTimeout(function() {
        foobar.style.width = "400px";
    }, 0);
    window.print();
}
</script>