chromium/third_party/blink/web_tests/http/tests/xmlviewer/no-unique-origin.html

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<title>Tests that a unique origin is NOT created for XML tree viewer when script is enabled</title>
<script>
  setup({single_test: true});

  function checkSourceXML() {
    done();
  }

  function onload() {
    xmlWindow = window.open('resources/sample.xml');
    xmlWindow.onload = checkSourceXML;
  }
</script>
<body onload="onload();">