chromium/chrome/test/data/extensions/api_test/native_bindings/web_request/manifest.json

{
  "name": "Web Request Extension",
  "description": "web request extension",
  "version": "1",
  "manifest_version": 2,
  "permissions": ["webRequest", "webRequestBlocking",
                  "http://*.example.com:*/*"],
  "background": {
    "scripts": ["background.js"]
  }
}