instead of guessing based on presence of the sequence header OBU. Bug: webrtc:11042 Change-Id: I9a0674249feceebb07299ea965c62e87499f6baf Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/161013 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29958}