<!DOCTYPE html>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
<p>PASS if no crash or assertion failure.</p>
<div style="backface-visibility:hidden; height:20px;"></div>
<div style="-webkit-columns:2;">
    <div style="-webkit-columns:2;">&nbsp;</div>
</div>