am 6b3178a6: Merge "Fix a race condition in wallpaper move throttling." into gingerbread

Merge commit '6b3178a6323e015644590ebaee86523e4bb81773' into gingerbread-plus-aosp

* commit '6b3178a6323e015644590ebaee86523e4bb81773':
  Fix a race condition in wallpaper move throttling.