The template never pass that parameter to create an audio encoder, and thus is de-facto always unused. Plan is to propagate field trials differently, during construction of the encoder rather than during construction of the encoder factory. Bug: webrtc:343086059 Change-Id: I96d49ef7f7ff37524a1eb64f7a2d73881c07e00a Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/354360 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Jakob Ivarsson <jakobi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42527}