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

webrtc/common_types.h

Index: webrtc/common_types.h
diff --git a/webrtc/common_types.h b/webrtc/common_types.h
index 7be74e68473c92c51107059c8ee690e9c4aa122a..e062f1dff4a91956374a60959a6277e6053bc45c 100644
--- a/webrtc/common_types.h
+++ b/webrtc/common_types.h
@@ -791,6 +791,16 @@ struct PacketTime {
                        // If unknown, this value will be set to zero.
 };
 
+struct SentPacket {
+  SentPacket() : transport_sequence_number(-1), send_time_ms(-1) {}
+  SentPacket(int32_t transport_sequence_number, int64_t send_time_ms)
+      : transport_sequence_number(transport_sequence_number),
+        send_time_ms(send_time_ms) {}
+
+  int32_t transport_sequence_number;
+  int64_t send_time_ms;
+};
+
 struct RTPHeaderExtension {
   RTPHeaderExtension();