Chromting is trying vp9 444 to have better color. This fix is needed to decode 444 properly. Bug: webrtc:11326 Change-Id: I4498930591d8876af9f6b7238a8c9fe450ecbfcc Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/166220 Commit-Queue: Jerome Jiang <jianj@google.com> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30410}