chromium/third_party/blink/web_tests/external/wpt/permissions-policy/resources/permissions-policy-bluetooth.html

<script>
  'use strict';

  navigator.bluetooth.getDevices().then(devices => {
    window.parent.postMessage({ type: 'availability-result', enabled: true}, '*');
  }, error => {
    window.parent.postMessage({ type: 'availability-result', enabled: false }, '*');
  });
</script>