chromium/third_party/blink/web_tests/external/wpt/resource-timing/resources/frameset-timing-frame.html

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./frame-timing.js"></script>

<script>
  test_frame_timing_before_load_event('frame');
  test_frame_timing_change_src('frame');
</script>