tree 661137a1b90b7c76fe39655a7b9d0cbd7c81d1b8
parent a97f8e208f4c8030ca775ca276104d90e209919b
author Zoe Liu <zoeliu@google.com> 1466274164 -0700
committer Zoe Liu <zoeliu@google.com> 1466553819 +0000

Add pred prob handling for new references in EXT_REFS

For the experiment of EXT_REFS, add the handling of the context
probabilities for both forward reference frames (namely
LAST/LAST2/LAST3/GOLDEN) and backward reference frames
(namely BWDREF/ALTREF).

Change-Id: Ibd991673acf6ff2fc9a56b8805eca9173cbf5fdc