Cleaned up the data path for payload data, made callbacks to rtp_receiver nonoptional.

The audio receiver is now completely independent of rtp_receiver: video will hopefully be too in the next patch.

BUG=
TEST=vie & voe_auto_test full runs

Review URL: https://webrtc-codereview.appspot.com/1014006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3372 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.h

@@ -12,7 +12,6 @@
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_RECEIVER_VIDEO_H_
 
 #include "bitrate.h"
-#include "rtp_receiver.h"
 #include "rtp_receiver_strategy.h"
 #include "rtp_rtcp_defines.h"
 #include "rtp_utility.h"
@@ -23,11 +22,14 @@ namespace webrtc {
 class CriticalSectionWrapper;
 class ModuleRtpRtcpImpl;
 class ReceiverFEC;
+class RTPReceiver;
 
 class RTPReceiverVideo : public RTPReceiverStrategy {
  public:
+  // TODO(phoglund): Get rid of dependency on "parent".
   RTPReceiverVideo(const WebRtc_Word32 id,
                    RTPReceiver* parent,
+                   RtpData* data_callback,
                    ModuleRtpRtcpImpl* owner);
 
   virtual ~RTPReceiverVideo();