Stopped using the NetEqDecoder enum internally in NetEq.

webrtc/modules/audio_coding/acm2/rent_a_codec.cc

Index: webrtc/modules/audio_coding/acm2/rent_a_codec.cc
diff --git a/webrtc/modules/audio_coding/acm2/rent_a_codec.cc b/webrtc/modules/audio_coding/acm2/rent_a_codec.cc
index e7aebcd14b79ee8a3bda9184e17b97ce4d7f219e..9468f0c921a9eabf9425291f9753c5c6a4472f88 100644
--- a/webrtc/modules/audio_coding/acm2/rent_a_codec.cc
+++ b/webrtc/modules/audio_coding/acm2/rent_a_codec.cc
@@ -94,7 +94,19 @@ rtc::Optional<SdpAudioFormat> RentACodec::NetEqDecoderToSdpAudioFormat(
       return rtc::Optional<SdpAudioFormat>(
           SdpAudioFormat("opus", 48000, 2,
                          std::map<std::string, std::string>{{"stereo", "1"}}));
-
+    case NetEqDecoder::kDecoderRED:
+      return rtc::Optional<SdpAudioFormat>(SdpAudioFormat("red", 8000, 1));
+    case NetEqDecoder::kDecoderAVT:
+      return rtc::Optional<SdpAudioFormat>(
+          SdpAudioFormat("telephone-event", 8000, 1));
+    case NetEqDecoder::kDecoderCNGnb:
+      return rtc::Optional<SdpAudioFormat>(SdpAudioFormat("cn", 8000, 1));
+    case NetEqDecoder::kDecoderCNGwb:
+      return rtc::Optional<SdpAudioFormat>(SdpAudioFormat("cn", 16000, 1));
+    case NetEqDecoder::kDecoderCNGswb32kHz:
+      return rtc::Optional<SdpAudioFormat>(SdpAudioFormat("cn", 32000, 1));
+    case NetEqDecoder::kDecoderCNGswb48kHz:
+      return rtc::Optional<SdpAudioFormat>(SdpAudioFormat("cn", 48000, 1));
     default:
       return rtc::Optional<SdpAudioFormat>();
   }