chromium/chrome/test/data/extensions/policy_shared_module/importer/manifest.json

{
  "name": "Imports a Shared Module",
  "manifest_version": 2,
  "version": "1.0",
  "app": {
    "background": {
      "page": "main.html"
    }
  },
  "import": [{
      "id": "nfgclafboonjbiafbllihiailjlhelpm"
    }
  ]
}