ref: 5d28b63687a07189134cee7135423d04775e6cdc
parent: dea22b4bdade9a854cb3d395bc25551093aa42ef
author: Dmitry Kovalev <dkovalev@google.com>
date: Wed Oct 23 13:54:13 EDT 2013
Cleaning up {above, left}_block_mode functions.
Making {above, left}_block_mode more clear and symmetric.
Change-Id: Ie348a950fb9a5cf52861d0cba838a58010ff56ad