These are replaced with the methods SendPictureLossIndication and SendFullIntraRequest, added in cl https://webrtc-review.googlesource.com/c/src/+/140043. Also delete the corresponding state variable RtpRtcpImpl::key_frame_req_method_, the enum KeyFrameRequestMethod, and the nearby unused enum RtpRtcpPacketType. Bug: None Change-Id: I1ac2e4ce6dbe20d1d1cbb3d5b2256ea55b341a57 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/141403 Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28221}