Wire up transport sequence number / send time callbacks to webrtc via libjingle.

webrtc/p2p/base/p2ptransportchannel.h

Index: webrtc/p2p/base/p2ptransportchannel.h
diff --git a/webrtc/p2p/base/p2ptransportchannel.h b/webrtc/p2p/base/p2ptransportchannel.h
index 8859111bd197fbd9cd2af66dfc22c774348d8d68..b5c961cf8949555397fe7226fc51501885960450 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -207,6 +207,7 @@ class P2PTransportChannel : public TransportChannelImpl,
   void OnConnectionStateChange(Connection* connection);
   void OnReadPacket(Connection *connection, const char *data, size_t len,
                     const rtc::PacketTime& packet_time);
+  void OnSentPacket(PortInterface* port, const rtc::SentPacket& sent_packet);
   void OnReadyToSend(Connection* connection);
   void OnConnectionDestroyed(Connection *connection);