undefined

manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Hipchat Auto Dismiss Notifications",
  "version": "1.0.0",
  "description": "Uses webkitNotifications instead of Notification so that notifications are auto dismissed after 5 seconds.",
  "permissions": [
    "https://*.hipchat.com/"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "https://*.hipchat.com/chat"
      ],
      "js": [
        "javascripts/killNotification.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "javascripts/inject.js"
  ]
}