Adding packet overhead to audio network adaptor.

webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_audio_network_adaptor.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_audio_network_adaptor.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_audio_network_adaptor.h b/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_audio_network_adaptor.h
index 44b63c0f7d8bd40477cf12668dccde37806f521e..a826911c2f79e994ca5cbab238f9f24e21b24d6a 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_audio_network_adaptor.h
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_audio_network_adaptor.h
@@ -30,6 +30,8 @@ class MockAudioNetworkAdaptor : public AudioNetworkAdaptor {
 
   MOCK_METHOD1(SetTargetAudioBitrate, void(int target_audio_bitrate_bps));
 
+  MOCK_METHOD1(SetOverhead, void(size_t overhead_bytes_per_packet));
+
   MOCK_METHOD0(GetEncoderRuntimeConfig, EncoderRuntimeConfig());
 
   MOCK_METHOD1(StartDebugDump, void(FILE* file_handle));