chromium/third_party/blink/web_tests/external/wpt/client-hints/service-workers/critical-ch/intercept-request.js

self.addEventListener('fetch', (event) => {
  result="FAIL";
  if(event.request.headers.has("sec-ch-device-memory") && event.request.headers.has("device-memory"))
    result="PASS";
  event.respondWith(new Response(result));
});