chromium/third_party/blink/web_tests/http/tests/security/drag-drop-same-unique-origin.html

<html>
<head>
<script>
if (window.testRunner) {
    testRunner.waitUntilDone();
    testRunner.dumpAsText();
}
</script>
</head>
<body>
<iframe src="http://127.0.0.1:8000/security/resources/drag-drop-allowed.html" sandbox="allow-scripts"></iframe>
</body>
</html>