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

webrtc/video_engine/vie_channel_group.h

Index: webrtc/video_engine/vie_channel_group.h
diff --git a/webrtc/video_engine/vie_channel_group.h b/webrtc/video_engine/vie_channel_group.h
index 374bd003330d214162d1aaa063b4640dc3993841..70c2cd57ff2fb0c52a2e9c3f1e34cde3c288a023 100644
--- a/webrtc/video_engine/vie_channel_group.h
+++ b/webrtc/video_engine/vie_channel_group.h
@@ -16,6 +16,7 @@
 #include <set>
 #include <vector>
 
+#include "webrtc/base/socket.h"
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
@@ -80,6 +81,8 @@ class ChannelGroup : public BitrateObserver {
                         uint8_t fraction_loss,
                         int64_t rtt) override;
 
+  void OnSentPacket(const rtc::SentPacket& sent_packet);
+
  private:
   typedef std::map<int, ViEChannel*> ChannelMap;
   typedef std::map<int, ViEEncoder*> EncoderMap;