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chromium/third_party/blink/web_tests/external/wpt/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-window.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: browsing context name - parent: top-level context (gets replaced)</title>
<iframe name="iframeOpener" src="choose-_parent-003-iframe.html"></iframe>