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chromium/third_party/blink/web_tests/external/wpt/x-frame-options/redirect.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>X-Frame-Options headers sent along with a redirect</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/helper.sub.js"></script>

<body>
<script>
"use strict";

xfo_test({
  url: `./support/redirect.py?value=DENY&url=/x-frame-options/support/xfo.py%3Fvalue%3DALLOWALL`,
  check: "loaded message",
  message: `XFO on redirect responses is ignored`
});
</script>