ref: a20d8c360759daee9c1f2ca6063eaca8f03aa9dd
parent: d998721f713024adad5f4c1b8e30737f2e06607c
author: Zoe Liu <zoeliu@google.com>
date: Wed Jun 13 13:33:57 EDT 2018
Unify frame_index in defining GF group structure Following are completed in defining GF group structure in firstpass: 1. Remove redundant alt_frame_index; 2. Remove hard coded index value with the variable of frame_index. Change-Id: I7b56e454559bbf704afc7410ea9832b20ffcd57e