am 3f5d7b83: am b876bdb5: Merge "Speed up layers rendering when using animations Cherry-pick from master" into froyo

Merge commit '3f5d7b83ee194db39c5f784146e4abc4f6568854' into kraken

* commit '3f5d7b83ee194db39c5f784146e4abc4f6568854':
  Speed up layers rendering when using animations