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

talk/session/media/channel.h

Index: talk/session/media/channel.h
diff --git a/talk/session/media/channel.h b/talk/session/media/channel.h
index 0a7ce9d1a9e8355bc83ac4433a751ef22deb0354..afd67bec7fc2e8765ee441c0e73e36b424749e4a 100644
--- a/talk/session/media/channel.h
+++ b/talk/session/media/channel.h
@@ -213,6 +213,8 @@ class BaseChannel
                              size_t len,
                              const rtc::PacketTime& packet_time,
                              int flags);
+  void OnPacketSent(TransportChannel* channel,
+                    const rtc::SentPacket& packet_sent);
   void OnReadyToSend(TransportChannel* channel);
 
   bool PacketIsRtcp(const TransportChannel* channel, const char* data,
@@ -261,10 +263,10 @@ class BaseChannel
                                    ContentSource src,
                                    std::string* error_desc);
 
-  // Helper method to get RTP Absoulute SendTime extension header id if
-  // present in remote supported extensions list.
-  void MaybeCacheRtpAbsSendTimeHeaderExtension(
-    const std::vector<RtpHeaderExtension>& extensions);
+  // Helper method to store a subset of the RTP header extensions, if
+  // present in the remote supported extensions list.
+  void MaybeCacheRtpHeaderExtensions(
+      const std::vector<RtpHeaderExtension>& extensions);
 
   bool CheckSrtpConfig(const std::vector<CryptoParams>& cryptos,
                        bool* dtls,
@@ -295,6 +297,9 @@ class BaseChannel
   }
 
  private:
+  int32_t ParseTransportSequenceNumberHeaderExtension(uint8_t* data,
+                                                      size_t length) const;
+
   rtc::Thread* worker_thread_;
   TransportController* transport_controller_;
   MediaChannel* media_channel_;
@@ -323,6 +328,7 @@ class BaseChannel
   bool dtls_keyed_;
   bool secure_required_;
   int rtp_abs_sendtime_extn_id_;
+  int rtp_transport_sequence_number_extn_id_;
 };
 
 // VoiceChannel is a specialization that adds support for early media, DTMF,