LayoutTests/imported/blink/http/tests/security/mixedContent/resources/frame-with-insecure-script-through-redirection.html

<script src="https://127.0.0.1:8443/security/resources/redir.php?url=http://127.0.0.1:8000/security/mixedContent/resources/script.js"></script>
<script>
window.onload = function() {
    if (window.opener)
        window.opener.postMessage('done', '*');
};
</script>