chromium/chrome/test/data/extensions/api_test/browser_action/popup/manifest.json

{
  "name": "Popup tester",
  "version": "0.1",
  "manifest_version": 2,
  "description": "apitest for popups",
  "browser_action": {
      "default_title": "grow",
      "default_icon": "chromium.png",
      "default_popup": "popup.html"
  }
}