Revert of Don't hardcode MediaType::ANY in FakeNetworkPipe.

webrtc/test/rtp_rtcp_observer.h

Index: webrtc/test/rtp_rtcp_observer.h
diff --git a/webrtc/test/rtp_rtcp_observer.h b/webrtc/test/rtp_rtcp_observer.h
index b268e4ba026d83ef316526a30a5b3e00e6d99764..8e1375f20fb06ccc6c509c149c24d7a211a21818 100644
--- a/webrtc/test/rtp_rtcp_observer.h
+++ b/webrtc/test/rtp_rtcp_observer.h
@@ -94,9 +94,8 @@
   PacketTransport(Call* send_call,
                   RtpRtcpObserver* observer,
                   TransportType transport_type,
-                  MediaType media_type,
                   const FakeNetworkPipe::Config& configuration)
-      : test::DirectTransport(configuration, send_call, media_type),
+      : test::DirectTransport(configuration, send_call),
         observer_(observer),
         transport_type_(transport_type) {}