chromium/src/third_party/blink/web_tests/http/tests/serviceworker/resources/font-face.css

@font-face {
  font-family: 'Ahem';
  /* Use the CORS approved resource so the cross-origin test doesn't fail with
   * network error. The request is still expected to be logged as initiated by a
   * no-cors stylesheet.
   */
  src: url(/css/resources/cors-ahem.php);
}

body {
  font-family: 'Ahem';
}