This condition is not effectively in use. The actual reference
frame masking is done in other route.
Change-Id: Ia59c843bcac7243dada92f0f67658d7ce43df5e8
Take out speed features that affect the compression performance
to simplify the coding route. This commit removes the motion field
mode search used in speed 3.
Change-Id: Ifdf6862cb1ece8261125a56d9d89bcef60758c00