<html>
<head>
<script>
if (window.testRunner) {
	testRunner.waitUntilDone();
	testRunner.dumpAsText();
	testRunner.dumpChildFramesAsText();
}

window.onmessage = function() {
	if (window.testRunner)
		internals.settings.setStorageBlockingPolicy('BlockAll');
	for (var i = 0; i < window.frames.length; ++i)
		window.frames[i].postMessage('blocked', '*');

	window.onmessage = function() {
		if (window.testRunner) {
			internals.settings.setStorageBlockingPolicy('AllowAll');
			testRunner.notifyDone();
		}
	}
}
</script>
</head>
<body>
<p>This iframe should return only one security error:</p>
<iframe src="http://127.0.0.1:8000/security/resources/iframe-for-storage-blocking-changed-shared-worker.html"></iframe>
</body>
</html>