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chromium/third_party/blink/web_tests/loader/link-load-only-supported-stylesheet-types-datauri.html 

<!DOCTYPE html>
<html>
<body>
    <link rel="stylesheet" type="text/css" href="data:text/css,%23blue { color: blue !important; }">
    <link rel="stylesheet" type="application/javascript" href="data:text/css,%23red { color: red !important; }">
    <link rel="stylesheet" href="data:text/css,%23yellow { color: yellow !important; }">
    <div style="color: green" id="blue">This text should be blue</div>
    <div style="color: green" id="red">This text should be green</div>
    <div style="color: green" id="yellow">This text should be yellow</div>
</body>
</html>