Using AudioOption to enable audio network adaptor.

webrtc/media/engine/fakewebrtccall.h

Index: webrtc/media/engine/fakewebrtccall.h
diff --git a/webrtc/media/engine/fakewebrtccall.h b/webrtc/media/engine/fakewebrtccall.h
index 5719070eeaee78049889c62518b343163838b451..dfe8fbb2bad06c0ead9235ac65a8900300ff1872 100644
--- a/webrtc/media/engine/fakewebrtccall.h
+++ b/webrtc/media/engine/fakewebrtccall.h
@@ -59,6 +59,13 @@ class FakeAudioSendStream final : public webrtc::AudioSendStream {
   void SetMuted(bool muted) override;
   webrtc::AudioSendStream::Stats GetStats() const 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;
+
   TelephoneEvent latest_telephone_event_;
   webrtc::AudioSendStream::Config config_;
   webrtc::AudioSendStream::Stats stats_;