Define Stream base classes

webrtc/audio_receive_stream.h

Index: webrtc/audio_receive_stream.h
diff --git a/webrtc/audio_receive_stream.h b/webrtc/audio_receive_stream.h
index c68d2647f20beb2142877558686764783f4b6571..99dee96e3f5bcd643948e6ba1d0a248273511e9c 100644
--- a/webrtc/audio_receive_stream.h
+++ b/webrtc/audio_receive_stream.h
@@ -16,13 +16,14 @@
 #include <vector>
 
 #include "webrtc/config.h"
+#include "webrtc/stream.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class AudioDecoder;
 
-class AudioReceiveStream {
+class AudioReceiveStream : public ReceiveStream {
  public:
   struct Stats {};
 
@@ -51,9 +52,6 @@ class AudioReceiveStream {
   };
 
   virtual Stats GetStats() const = 0;
-
- protected:
-  virtual ~AudioReceiveStream() {}
 };
 }  // namespace webrtc