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chromium/third_party/blink/web_tests/http/tests/cache/svg-use-revalidate.html 

<!DOCTYPE HTML>
<svg width="500" height="500" overflow="hidden" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <use xlink:href="resources/circles-no-cache.svg#red" />
</svg>
<script>
if (window.testRunner)
    testRunner.waitUntilDone();

window.onload = function() {
    setTimeout(function() {
        var circle = document.getElementsByTagName("use")[0];
        circle.setAttributeNS("http://www.w3.org/1999/xlink", "href", "resources/circles-no-cache.svg#green");
        if (window.testRunner)
            testRunner.notifyDone();
    }, 0);
}
</script>