Set actual transport overhead in rtp_rtcp

webrtc/modules/rtp_rtcp/include/rtp_rtcp.h

Index: webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
diff --git a/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h b/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
index 9fa3959c906128a81596a7fc8f97e9a269167bbc..78848433ae7eb69ec882eb54ec222563994ab984 100644
--- a/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
+++ b/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
@@ -115,10 +115,14 @@ class RtpRtcp : public Module {
   // |authentication_overhead| - number of bytes to leave for an authentication
   // header.
   // Returns -1 on failure else 0
+  // TODO(michaelt): deprecate the function.
   virtual int32_t SetTransportOverhead(bool tcp,
                                        bool ipv6,
                                        uint8_t authentication_overhead = 0) = 0;
 
+  // Sets transtport overhead per packet.
+  virtual void SetTransportOverhead(int transport_overhead_per_packet_byte) = 0;
+
   // Returns max payload length, which is a combination of the configuration
   // MaxTransferUnit and TransportOverhead.
   // Does not account for RTP headers and FEC/ULP/RED overhead (when FEC is