chromium/chrome/test/data/extensions/api_test/permissions/optional_updates_bindings/manifest.json

{
  "background": {
    "persistent": false,
    "scripts": ["background.js"]
  },
  "manifest_version": 2,
  "name": "optional_updates_bindings",
  "optional_permissions": [
    "alarms"
  ],
  "version": "1"
}