It was used only for the frame decryptor. Decryptor needs only raw representation that it can recreate in a way compatible with the new version of the descriptor. Bug: webrtc:10342 Change-Id: Ie098235ebb87c6f5e2af42d0022d2365cd6bfa29 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/166163 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30501}