chrome/test/data/extensions/allow_silent_upgrade/media_galleries4_new.json

{
  "name": "allow silent update",
  "version": "1.0",
  "manifest_version": 2,
  "permissions": [
    { "mediaGalleries": ["allAutoDetected"] }
  ],
  "app": {
    "background": {
      "scripts": ["media_galleries.js"]
    }
  }
}