WebRTC standalone tests show 24% speed up on foreman_cif, 16% speed up
on a 240p clip and 11% speed up on Bridge_r180.
Bug: None
Change-Id: I433b7a8841bd9df2402575f72dd1984cc5e011a9
Reviewed-on: https://webrtc-review.googlesource.com/29260
Commit-Queue: Jerome Jiang <jianj@google.com>
Reviewed-by: Magnus Flodman <mflodman@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21096}