Define Stream base classes

webrtc/video/audio_receive_stream.h

Index: webrtc/video/audio_receive_stream.h
diff --git a/webrtc/video/audio_receive_stream.h b/webrtc/video/audio_receive_stream.h
index 9935117d0f565dc1a7698a9d587146765ba6ae98..08d929adb32620904cc8eafc054f402399a4a510 100644
--- a/webrtc/video/audio_receive_stream.h
+++ b/webrtc/video/audio_receive_stream.h
@@ -26,11 +26,16 @@ class AudioReceiveStream : public webrtc::AudioReceiveStream {
                      const webrtc::AudioReceiveStream::Config& config);
   ~AudioReceiveStream() override {}
 
+  // webrtc::ReceiveStream implementation.
+  void Start() override;
+  void Stop() override;
+  void SignalNetworkState(NetworkState state) override;
+  bool DeliverRtcp(const uint8_t* packet, size_t length) override;
+  bool DeliverRtp(const uint8_t* packet, size_t length) override;
+
+  // webrtc::AudioReceiveStream implementation.
   webrtc::AudioReceiveStream::Stats GetStats() const override;
 
-  bool DeliverRtcp(const uint8_t* packet, size_t length);
-  bool DeliverRtp(const uint8_t* packet, size_t length);
-
   const webrtc::AudioReceiveStream::Config& config() const {
     return config_;
   }