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chromium/third_party/blink/web_tests/http/tests/css/remove-blocking-with-loading-import.html 

<!DOCTYPE html>
<script>
  setTimeout(() => link.remove(), 0);
</script>
<link id="link" href="data:text/css,@import url(http://127.0.0.1:8000/css/resources/shared.css)" rel="stylesheet">
<p>PASS</p>