chromium/chrome/test/data/web_apps/subapps_isolated_app/sub1/manifest.webmanifest

{
  "name": "sub1",
  "icons": [{
    "src": "/subapps_icon.png",
    "sizes": "512x512",
    "type": "image/png"
    }],
  "start_url": "/sub1/page.html",
  "display": "standalone"
}