Add functionality which limits the number of bytes on the network.

webrtc/modules/congestion_controller/transport_feedback_adapter.h

Index: webrtc/modules/congestion_controller/transport_feedback_adapter.h
diff --git a/webrtc/modules/congestion_controller/transport_feedback_adapter.h b/webrtc/modules/congestion_controller/transport_feedback_adapter.h
index 063b34dcfbfdac2fa3f16448c10f13e1602710f4..4fe70c5dcc37043075566af3c5363555a7ffd9dd 100644
--- a/webrtc/modules/congestion_controller/transport_feedback_adapter.h
+++ b/webrtc/modules/congestion_controller/transport_feedback_adapter.h
@@ -11,6 +11,7 @@
 #ifndef WEBRTC_MODULES_CONGESTION_CONTROLLER_TRANSPORT_FEEDBACK_ADAPTER_H_
 #define WEBRTC_MODULES_CONGESTION_CONTROLLER_TRANSPORT_FEEDBACK_ADAPTER_H_
 
+#include <deque>
 #include <vector>
 
 #include "webrtc/modules/remote_bitrate_estimator/include/send_time_history.h"
@@ -46,11 +47,14 @@ class TransportFeedbackAdapter {
   // to the CongestionController interface.
   void OnTransportFeedback(const rtcp::TransportFeedback& feedback);
   std::vector<PacketFeedback> GetTransportFeedbackVector() const;
+  rtc::Optional<int64_t> GetMinFeedbackLoopRtt() const;
 
   void SetTransportOverhead(int transport_overhead_bytes_per_packet);
 
   void SetNetworkIds(uint16_t local_id, uint16_t remote_id);
 
+  size_t GetOutstandingBytes() const;
+
  private:
   std::vector<PacketFeedback> GetPacketFeedbackVector(
       const rtcp::TransportFeedback& feedback);
@@ -65,6 +69,8 @@ class TransportFeedbackAdapter {
   std::vector<PacketFeedback> last_packet_feedback_vector_;
   uint16_t local_net_id_ GUARDED_BY(&lock_);
   uint16_t remote_net_id_ GUARDED_BY(&lock_);
+  std::deque<int64_t> feedback_rtts_ GUARDED_BY(&lock_);
+  rtc::Optional<int64_t> min_feedback_rtt_ GUARDED_BY(&lock_);
 
   rtc::CriticalSection observers_lock_;
   std::vector<PacketFeedbackObserver*> observers_ GUARDED_BY(&observers_lock_);