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<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id="log"></div>
<iframe style="display:none" id="frame"></iframe>
<script>
  async_test(function (t) {
    let frame = document.getElementById("frame");
    frame.contentWindow.test = function() {
      frame.contentWindow.requestIdleCallback(t.step_func_done());
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    frame.contentWindow.test();
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</script>