<!DOCTYPE html>
<html>
<head>
    <style>
    body {
        -webkit-mask: none,repeat-x !important;
    }
    </style>
    <script type="text/javascript">
    if (window.testRunner)
        testRunner.dumpAsText();

    function init()
    {
        document.styleSheets[0].rules[0].cssText;
    }
    </script>
</head>
<body onload="init()">
    <p> This test should not assert when serializing the -webkit-mask property. </p>
</body>
</html>