chromium/content/test/data/gpu/webgpu-domain-blocking-page2.html

<script type="text/javascript">
var initFinished = false;
var gotAdapter = false;

async function init()
{
  const adapter = await navigator.gpu.requestAdapter();
  if (adapter !== null) {
    gotAdapter = true;
  }
  initFinished = true;
}

init();
</script>