chromium/extensions/test/data/system/network/manifest.json

{
  "name": "chrome.system.network extension",
  "manifest_version": 2,
  "version": "0.1",
  "description": "end-to-end browser test for chrome.system.network API",
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  },
  "permissions": ["system.network"]
}