Cast: Simplify code path for RTCP sender report

media/cast/transport/transport_audio_sender.h

Index: media/cast/transport/transport_audio_sender.h
diff --git a/media/cast/transport/transport_audio_sender.h b/media/cast/transport/transport_audio_sender.h
index 33108e01b3219ae366f063dbcf15480b3fc3798e..c5bbe0779616ad381da40e453d5608689cba5d27 100644
--- a/media/cast/transport/transport_audio_sender.h
+++ b/media/cast/transport/transport_audio_sender.h
@@ -39,12 +39,11 @@ class TransportAudioSender : public base::NonThreadSafe {
   void ResendPackets(
       const MissingFramesAndPacketsMap& missing_frames_and_packets);
 
+  size_t send_packet_count() const { return rtp_sender_.send_packet_count(); }
+  size_t send_octet_count() const { return rtp_sender_.send_octet_count(); }
+  uint32 ssrc() const { return rtp_sender_.ssrc(); }
   bool initialized() const { return initialized_; }
 
-  // Subscribe callback to get RTP Audio stats.
-  void SubscribeAudioRtpStatsCallback(
-      const CastTransportRtpStatistics& callback);
-
  private:
   friend class LocalRtcpAudioSenderFeedback;