am 405da17e: am e0c6f48d: Merge "Revert "customtabs: Add "extraCommand" and "extraCallback", for unsupported commands"" into mnc-dev

* commit '405da17e2edda05be24f9eba8e5992868c95c983':
  Revert "customtabs: Add "extraCommand" and "extraCallback", for unsupported commands"