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chromium/third_party/blink/web_tests/http/tests/navigation/ping-cross-origin-from-https.html 

<html><head>
<title>Ping</title>
<script>

if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
    testRunner.dumpPingLoaderCallbacks();
}

if (location.protocol != "https:")
    location = "https://127.0.0.1:8443/navigation/resources/ping-cross-origin-from-https-target.html";
</script>
</head></html>