am 7d4739be: Merge "Reduce lock thrashing in native Looper." into gingerbread

Merge commit '7d4739bed5cd5f41ddfa431446b51f61b94d7b0b' into gingerbread-plus-aosp

* commit '7d4739bed5cd5f41ddfa431446b51f61b94d7b0b':
  Reduce lock thrashing in native Looper.