chromium/chrome/test/data/extensions/platform_apps/app_window/generic/manifest.json

{
  "name": "Shell Window - Generic",
  "description": "A test app which creates a window configured in tests. The window must be closed in the test.",
  "version": "1.0",
  "manifest_version": 2,
  "app": {
    "background": {
      "scripts": ["main.js"]
    }
  },
  "permissions": ["app.window.fullscreen", "app.window.alwaysOnTop"]
}