chromium/chrome/test/data/extensions/platform_apps/isolation/manifest.json

{
  "name": "Platform App Test: isolated storage",
  "manifest_version": 2,
  "version": "1",
  "app": {
    "background": {
      "scripts": ["test.js"]
    }
  },
  "permissions": [
    "http://localhost/"
  ]
}