chrome/test/webdriver/test/page_action_extension/manifest.json

{
  "name": "Page action extension",
  "manifest_version": 2,
  "version": "1.0",
  "background": {
    "page": "bg.html"
  },
  "page_action": {
    "default_popup": "view_checks.html"
  },
  "permissions": [ "tabs" ]
}