chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/clients-matchall-client-types-iframe.html

<!DOCTYPE html>
<title>Empty doc</title>
<!--
  Change the page URL using the History API to ensure that ServiceWorkerClient
  uses the creation URL.
-->
<body onload="history.pushState({}, 'title', 'url-modified-via-pushstate.html')">
</body>