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chromium/third_party/blink/web_tests/external/wpt/domparsing/resources/domparser-iframe-pushstate.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>An iframe that does DOMParser stuff and pushstates itself</title>

<script>
"use strict";
history.pushState(null, "", "/fake/push-state-from-iframe");
</script>
<script src="/domparsing/resources/domparser-iframe.js"></script>