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chromium/third_party/blink/web_tests/fast/css/remove-loading-style.html 

<!DOCTYPE html>
<!-- crbug.com/345114: Adding and removing a style with an @import at page load causes the page to never render.-->
<div>PASS</div>
<script>
  var s = document.createElement('style');
  s.textContent = "@import url('resources/red.css');";
  document.head.appendChild(s);
  s.parentNode.removeChild(s);
</script>