chromium/chrome/test/data/web_app_info/full.json

{
  "name": "hello",
  "description": "This app is super awesome",
  "launch_url": "launch_url",
  "launch_container": "panel",
  "permissions": [ "geolocation", "notifications" ],
  "offline_enabled": true,
  "urls": [ "foobar", "baz" ],
  "icons": {
    "ignored": "ignored.png",
    "16": "16.png",
    // We also ignore this because it is larger than 128.
    "500": "500.png"
  }
}