strict-mode-image-in-frame-blocked.https.html

<!doctype html>
<html>
<head>
    <meta http-equiv="Content-Security-Policy" content="block-all-mixed-content">
    <script>
        if (window.testRunner) {
            testRunner.waitUntilDone();
            testRunner.dumpAsText();
        }
        window.addEventListener("message", function (e) {
          if (window.testRunner)
              testRunner.notifyDone();
        }, false);
    </script>
</head>
<body>
    <p>This test passes if the image in the frame below is treated as blockable content.</p>
    <iframe src="resources/frame-with-insecure-image.html"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/security/mixedContent/strict-mode-image-in-frame-blocked.https.html