Using AudioOption to enable audio network adaptor.

webrtc/audio/audio_send_stream.h

Index: webrtc/audio/audio_send_stream.h
diff --git a/webrtc/audio/audio_send_stream.h b/webrtc/audio/audio_send_stream.h
index 2e0b7aed584620aaddcdf6f8c92b3926389b73b9..30358c05e7e55d54600e8438467eb69b8fb4b025 100644
--- a/webrtc/audio/audio_send_stream.h
+++ b/webrtc/audio/audio_send_stream.h
@@ -56,6 +56,13 @@ class AudioSendStream final : public webrtc::AudioSendStream,
                             uint8_t fraction_loss,
                             int64_t rtt) override;
 
+  bool EnableAudioNetworkAdaptor(const std::string& config_string) override;
+
+  void DisableAudioNetworkAdaptor() override;
+
+  void SetReceiverFrameLengthRange(int min_frame_length_ms,
+                                   int max_frame_length_ms) override;
+
   const webrtc::AudioSendStream::Config& config() const;
 
  private: