This will be used as a fall-back when the encoder adapter doesn't
provide any dependency structure. This ensures we can always generate a
dependency descriptor RTP header extension for VP8.
Before, when switching between encoder adapters where the old one
generated a dependency structure but the new one didn't we had to make
sure the structure was cleared so that packets weren't sent with the
dependency structure from the previous adapter. This will not be a
problem anymore since the new adapter will use the simulated dependency
structure.
Bug: b/227749056
Change-Id: I8463c48a9dcde4b8d32c519819dd8a92acd8e43b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/262765
Commit-Queue: Emil Lundmark <lndmrk@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36930}
6c81a42eb1