Adding packet overhead to audio network adaptor.

webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h b/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
index 8853db526d2de5ab27ae1401112c248284aa262f..549eef9bddd14c0046505a576024922d1a4a3174 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
@@ -45,6 +45,8 @@ class AudioNetworkAdaptorImpl final : public AudioNetworkAdaptor {
 
   void SetTargetAudioBitrate(int target_audio_bitrate_bps) override;
 
+  void SetOverhead(size_t overhead_bytes_per_packet) override;
+
   EncoderRuntimeConfig GetEncoderRuntimeConfig() override;
 
   void StartDebugDump(FILE* file_handle) override;