Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/browsers/browsing-the-web/navigating-across-documents/003-2.html 

<!doctype html>
003-2
<script>
onload = function() {
  parent.postMessage("003-2", "*")
  setTimeout(function() {history.go(-1)})
}
onunload = function() {location = "003-3.html"}
</script>