chromium/chrome/test/data/web_apps/no_manifest_id.json

{
  "name": "Web app with no manifest id",
  "icons": [
    {
      "src": "basic-192.png",
      "sizes": "192x192",
      "type": "image/png"
    }
  ],
  "start_url": "basic.html",
  "display": "standalone"
}