chromium/chrome/test/data/extensions/api_test/instance_id/get_id/manifest.json

{
  "manifest_version": 2,
  "name": "Test InstanceID App",
  "version": "1.0",
  "description": "Tests InstanceID API",
  "background": {
    "scripts": ["get_id.js"]
  },
  "permissions": ["gcm"]
}