chromium/chrome/test/data/extensions/api_test/permissions/optional/manifest.json

{
   "name": "permissions/optional",
   "description": "permissions/optional",
   "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDkprt3BRSqoikAhSygI6VUzDLt18cKODYmkaa/dwPp4dboyz93RSB+v76grbqsNWrJjkrEwRD3QFeBYBq7h27XAMV4X5XvWjmWQBkRTBQyQI8cZd7M9dgfKrI3EqX9OJvd/wTJkC0dgF47nwWRa/Tvwl7Y66GwEEUjpn2MTv4klwIDAQAB",
   "version": "0.1",
   "manifest_version": 2,
   "background": {
     "scripts": ["background.js"],
     "persistent": true
   },
   "content_scripts": [{
     "matches": ["http://contentscript.com/*"],
     "js": ["content_script.js"]
   }],
   "permissions": [
     "management",
     "http://a.com/*"
   ],
   "optional_permissions": [
     "bookmarks",
     "cookies",
     "background",
     "http://*.c.com/*"
   ]
}