am 4ef44d6f: (-s ours) am c286c6ab: Merge "add a possible volume behavior. Some device will be silent mode after the first volume up from vibrate mode.(removed tab)" into gingerbread

* commit '4ef44d6fc35c151dcf3ead0fff1018200bb9b836':
  add a possible volume behavior. Some device will be silent mode after the first volume up from vibrate mode.(removed tab)