This is protected behind a field trial, for controlled rollout. TESTED=MediaCodec (Qualcomm + Exynos) and VideoToolbox senders. BUG=webrtc:8423 Change-Id: Ibccefb3d374e4a44461d33e77eff754d8d752666 Reviewed-on: https://webrtc-review.googlesource.com/13863 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Rasmus Brandt <brandtr@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20408}