chromium/chrome/test/data/extensions/api_test/browser_action/none/manifest.json

{
  "name": "An extension with no browser action",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "tabs", "http://*/*"
  ]
}