LayoutTests/http/tests/security/contentSecurityPolicy/upgrade-insecure-requests/resources/frame-with-redirect-https-to-http-script.html

<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
<script src="hTtpS://127.0.0.1:8443/resources/redirect.php?url=hTtP://127.0.0.1:8080/security/mixedContent/resources/script.js"></script>