to convert flags which chains a video frame part of into chain_diffs Bug: webrtc:10342 Change-Id: I6fb899eae934078223b101c9f85e2ac101980d4c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175108 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31306}