chromium/chrome/test/data/extensions/api_test/cookies/events/manifest.json

{
  "name": "events",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Tests cookie events.",
  "permissions": ["cookies", "http://a.com/"],
  "background": {
    "scripts": ["test.js"],
    "persistent": false
  }
}