frame-with-subframe-and-reload.html

<html>
<body>
<iframe id="img-frame" src="https://127.0.0.1:8443/security/mixedContent/resources/frame-with-insecure-css-image.html";>
</iframe>
<script>
var pageLoadCounter = 0;

window.addEventListener("message", function (e) {
    ++pageLoadCounter;

    if (pageLoadCounter === 1) {
        console.log("Reloading...")
        document.getElementById("img-frame").contentWindow.location.reload();
    }

    if (pageLoadCounter === 2) {
        console.log("Second load finished.")
        if(window.testRunner)
            testRunner.notifyDone();
    }
}, false);
</script>
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/security/mixedContent/resources/frame-with-subframe-and-reload.html