Remove webrtc/stream.h and unutilized inheritance.

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index bc580e3cccc01e0966a812781c9106de8f39c5dc..e9edf27bcb66bf9a3378a325fe9a5e37ae234dfc 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -80,10 +80,6 @@ bool FakeAudioReceiveStream::DeliverRtp(const uint8_t* packet,
   return true;
 }
 
-bool FakeAudioReceiveStream::DeliverRtcp(const uint8_t* packet, size_t length) {
-  return true;
-}
-
 webrtc::AudioReceiveStream::Stats FakeAudioReceiveStream::GetStats() const {
   return stats_;
 }