chromium/chrome/test/data/extensions/api_test/active_tab_cors/manifest.json

{
  "manifest_version": 2,
  "name": "The content script should have an access to the page origin",
  "version": "1.0",
  "browser_action": {},
  "background" : {
    "scripts" : ["background.js"]
  },
  "permissions": [
    "activeTab"
  ]
}