iframe-throttling-change-during-load.html

<!DOCTYPE html>
<script src='../../resources/testharness.js'></script>
<script src='../../resources/testharnessreport.js'></script>
<div style='height:1000px'></div>
<iframe sandbox srcdoc="&lt;object data=fake.html&gt;&lt;/object&gt;"></iframe>
<script>
  // The iframe is outside the scrolling viewport of the top document, so it
  // will be throttled as soon as it loads. When the plugin element loads, it
  // will also become throttled, because its parent document is throttled. The
  // throttling state transition for the plugin can happen when the plugin
  // hasn't yet installed its content document. This test ensures that the
  // throttling state transition for the plugin doesn't cause a crash due to
  // the missing document.
  test(() => {}, "No crash when a plugin element inside a cross-origin iframe becomes throttled during load");
</script>

chromium/third_party/blink/web_tests/fast/loader/iframe-throttling-change-during-load.html