Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/browsers/history/joint-session-history/joint-session-history-grandchild1.html 

<body>
  <a id="link" href="joint-session-history-grandchild2.html">Grandchild1</a>.
</body>
<script>
  window.onload = function() {
    document.getElementById("link").click();
  }
</script>