chromium/chrome/test/data/extensions/api_test/panels/focus_change_on_minimize/manifest.json

{
  "name": "Extension to test focus change event on panel minimize",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Tests that minimizing a panel fires onFocusChanged event.",
  "background": {
    "scripts": ["test.js"]
  },
  "permissions": ["tabs"]
}