this will speed up realtime encoding. Change-Id: I39d42f3c195d2f520f04f7357e72b0903905ea81 Bug: None Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176383 Reviewed-by: Marco Paniconi <marpan@webrtc.org> Commit-Queue: Jerome Jiang <jianj@google.com> Cr-Commit-Position: refs/heads/master@{#31431}