Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/browsers/windows/browsing-context-names/resources/open-in-_parent.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: browsing context name - parent</title>
<link rel="author" title="Intel" href="http://www.intel.com/">
<script>

window.open("post-to-top.html", "_parent");

</script>