The sync buffer length is already added when the buffer level filter is updated. Bug: webrtc:10736 Change-Id: Icbd411d4fd7b16f31b800142d1b6a8de79365d91 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/140950 Reviewed-by: Minyue Li <minyue@webrtc.org> Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28261}