Remove webrtc/stream.h and unutilized inheritance.

webrtc/video/video_receive_stream.h

Index: webrtc/video/video_receive_stream.h
diff --git a/webrtc/video/video_receive_stream.h b/webrtc/video/video_receive_stream.h
index a7ee42d01bfe387f7dc2e491d0c7c0fc48dce985..fa02d7c4c1c84e2563ed4d366030e24189406859 100644
--- a/webrtc/video/video_receive_stream.h
+++ b/webrtc/video/video_receive_stream.h
@@ -54,16 +54,16 @@ class VideoReceiveStream : public webrtc::VideoReceiveStream,
                      VieRemb* remb);
   ~VideoReceiveStream() 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;
+  void SignalNetworkState(NetworkState state);
+  bool DeliverRtcp(const uint8_t* packet, size_t length);
   bool DeliverRtp(const uint8_t* packet,
                   size_t length,
-                  const PacketTime& packet_time) override;
+                  const PacketTime& packet_time);
 
   // webrtc::VideoReceiveStream implementation.
+  void Start() override;
+  void Stop() override;
+
   webrtc::VideoReceiveStream::Stats GetStats() const override;
 
   // Overrides I420FrameCallback.