chromium/third_party/blink/web_tests/external/wpt/paint-timing/fcp-only/fcp-svg.html

<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test: FCP with SVG</title>
<style>
    #main {
        width: 100px;
        height: 100px;
        left: 0px;
        position: relative;
    }

    #circle {
      display: none;
    }

    /* contentful class is defined in test_fcp script. */
    #main.contentful #circle {
        display: block;
    }
</style>
</head>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/utils.js"></script>
<div id="main">
  <svg viewBox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"
     xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
      <circle id="myCircle" cx="5" cy="5" r="4" stroke="blue"/>
    </defs>
    <use id="circle" href="#myCircle" fill="green" />
  </svg>
</div>
<script>
    test_fcp("First contentful paint fires when SVG becomes contentful.")
</script>
</body>

</html>