chrome/test/data/extensions/api_test/xhr_persistent_fs/manifest.json

{
  "name": "Test XHR for Persistent FileSystem",
  "version": "1",
  "manifest_version": 2,
  "permissions": [
    "unlimitedStorage"
  ],
  "app": {
    "background": {
      "scripts": ["bg.js"]
    }
  }
}