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chromium
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chromium/third_party/blink/web_tests/fast/css/contentDivWithChildren.html 

<html>
<head>
    <style>
        div {
            content:url(resources/show-shoes-vs-pie.png); 
        }
    </style>
</head>

<body>

    <div>
        <div style="background-color:cyan; width:50px; height:600px;"></div>
    </div>

</body>
</html>