Revert of Renaming AudioEncoder::SetTargetBitrate and SetProjectedPacketLossRate.

webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h

Index: webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
diff --git a/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h b/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
index d069cbef158e5ba5eea8694b7acd599a54a0cf71..a08118364cc44b591060b3521684ec91c0d0246e 100644
--- a/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
+++ b/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
@@ -49,11 +49,10 @@
   bool SetDtx(bool enable) override;
   bool SetApplication(Application application) override;
   void SetMaxPlaybackRate(int frequency_hz) override;
+  void SetProjectedPacketLossRate(double fraction) override;
+  void SetTargetBitrate(int target_bps) override;
   rtc::ArrayView<std::unique_ptr<AudioEncoder>> ReclaimContainedEncoders()
       override;
-  void OnReceivedUplinkPacketLossFraction(
-      float uplink_packet_loss_fraction) override;
-  void OnReceivedTargetAudioBitrate(int target_audio_bitrate_bps) override;
 
  protected:
   EncodedInfo EncodeImpl(uint32_t rtp_timestamp,