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chromium/third_party/blink/web_tests/external/wpt/html/browsers/windows/browsing-context-names/resources/post-to-top.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: post window's name to top browsing context</title>
<link rel="author" title="Intel" href="http://www.intel.com/">
<script>
top.postMessage({
  name: window.name,
  isTop: (window.top === window)
}, "*");
</script>