Add video send bitrates to histogram stats:

- total bitrate ("WebRTC.Video.BitrateSentInKbps")
- media bitrate ("WebRTC.Video.MediaBitrateSentInKbps")
- rtx bitrate ("WebRTC.Video.RtxBitrateSentInKbps")
- padding bitrate ("WebRTC.Video.PaddingBitrateSentInKbps")
- retransmitted bitrate ("WebRTC.Video.RetransmittedBitrateInKbps")

Add retransmitted bytes to StreamDataCounters.

Change in UpdateRtpStats to also update counters for retransmitted packet.

BUG=crbug/419657
R=mflodman@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/30199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7838 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

@@ -803,6 +803,7 @@ bool ModuleRtpRtcpImpl::RtcpXrRrtrStatus() const {
   return rtcp_sender_.RtcpXrReceiverReferenceTime();
 }
 
+// TODO(asapersson): Replace this method with the one below.
 int32_t ModuleRtpRtcpImpl::DataCountersRTP(
     size_t* bytes_sent,
     uint32_t* packets_sent) const {
@@ -821,6 +822,12 @@ int32_t ModuleRtpRtcpImpl::DataCountersRTP(
   return 0;
 }
 
+void ModuleRtpRtcpImpl::GetSendStreamDataCounters(
+    StreamDataCounters* rtp_counters,
+    StreamDataCounters* rtx_counters) const {
+  rtp_sender_.GetDataCounters(rtp_counters, rtx_counters);
+}
+
 int32_t ModuleRtpRtcpImpl::RemoteRTCPStat(RTCPSenderInfo* sender_info) {
   return rtcp_receiver_.SenderInfoReceived(sender_info);
 }