[Cast] Cleanup: Remove TransportXXXXXSender, an unnecessary layer of indirection.

media/cast/transport/cast_transport_sender_impl.h

Index: media/cast/transport/cast_transport_sender_impl.h
diff --git a/media/cast/transport/cast_transport_sender_impl.h b/media/cast/transport/cast_transport_sender_impl.h
index 91b03c52bedde6ea99edd95be127dc43f407c3e4..067a275cf8d83e7aa1001399801c7f872e303abb 100644
--- a/media/cast/transport/cast_transport_sender_impl.h
+++ b/media/cast/transport/cast_transport_sender_impl.h
@@ -17,8 +17,7 @@
 #include "media/cast/transport/cast_transport_sender.h"
 #include "media/cast/transport/pacing/paced_sender.h"
 #include "media/cast/transport/rtcp/rtcp_builder.h"
-#include "media/cast/transport/transport_audio_sender.h"
-#include "media/cast/transport/transport_video_sender.h"
+#include "media/cast/transport/rtp_sender/rtp_sender.h"
 
 namespace media {
 namespace cast {
@@ -82,8 +81,8 @@ class CastTransportSenderImpl : public CastTransportSender {
   LoggingImpl logging_;
   PacedSender pacer_;
   RtcpBuilder rtcp_builder_;
-  scoped_ptr<TransportAudioSender> audio_sender_;
-  scoped_ptr<TransportVideoSender> video_sender_;
+  scoped_ptr<RtpSender> audio_sender_;
+  scoped_ptr<RtpSender> video_sender_;
 
   // This is non-null iff |raw_events_callback_| is non-null.
   scoped_ptr<SimpleEventSubscriber> event_subscriber_;