chromium/chrome/test/data/extensions/api_test/management/install_replacement_web_app/acceptable_web_app/manifest.json

{
  "name": "Installable web app",
  "icons": [
   {
      "src": "image-512px.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "start_url": "index.html",
  "display": "browser"
}