Vincent Rabaud 690efd82f8 Avoid several backward reference copies.
An extra VP8LBackwardRefs struct is used but it was used internally anyway.

Change-Id: Ifcb36ce42b8c21ef3c7a1daf38cb7f714687fcb2
2017-04-14 15:34:50 +02:00
..
2017-01-23 18:07:00 -08:00