<html>
<head>
<title>Web app banner test page</title>
<script src="main.js"></script>
<link rel="manifest" href="manifest_with_start_url.json">
</head>
<body onload="initializeWithWorker('service_worker.js')">
Service worker returns a response object if it's offline, so the page
supports the offline environment.
</body>
</html>