Expose ILBC codec in webrtc/api/audio_codecs/

webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h

Index: webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h b/webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h
index bc01a5de7d5e782724e4371dcbc0475e56bf1750..5269f4d456c28867adbdaeba275730e3ea443216 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h
+++ b/webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h
@@ -18,10 +18,10 @@ typedef struct iLBC_decinst_t_ IlbcDecoderInstance;
 
 namespace webrtc {
 
-class AudioDecoderIlbc final : public AudioDecoder {
+class AudioDecoderIlbcImpl final : public AudioDecoder {
  public:
-  AudioDecoderIlbc();
-  ~AudioDecoderIlbc() override;
+  AudioDecoderIlbcImpl();
+  ~AudioDecoderIlbcImpl() override;
   bool HasDecodePlc() const override;
   size_t DecodePlc(size_t num_frames, int16_t* decoded) override;
   void Reset() override;
@@ -39,7 +39,7 @@ class AudioDecoderIlbc final : public AudioDecoder {
 
  private:
   IlbcDecoderInstance* dec_state_;
-  RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderIlbc);
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderIlbcImpl);
 };
 
 }  // namespace webrtc