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

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index 41b2c83d382a9be2f8d21adea1f550cf6eaf6131..26e409f43a7d0fb573102ba9c91c9624a1b32019 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -77,6 +77,8 @@ class Call : public webrtc::Call, public PacketReceiver {
       const webrtc::Call::Config::BitrateConfig& bitrate_config) override;
   void SignalNetworkState(NetworkState state) override;
 
+  void OnSentPacket(const rtc::SentPacket& sent_packet) override;
+
  private:
   DeliveryStatus DeliverRtcp(MediaType media_type, const uint8_t* packet,
                              size_t length);
@@ -411,6 +413,10 @@ void Call::SignalNetworkState(NetworkState state) {
   }
 }
 
+void Call::OnSentPacket(const rtc::SentPacket& sent_packet) {
+  channel_group_->OnSentPacket(sent_packet);
+}
+
 void Call::ConfigureSync(const std::string& sync_group) {
   // Set sync only if there was no previous one.
   if (config_.voice_engine == nullptr || sync_group.empty())