Tweaked version of BBR for WebRTC.

webrtc/modules/remote_bitrate_estimator/test/packet_sender.h

Index: webrtc/modules/remote_bitrate_estimator/test/packet_sender.h
diff --git a/webrtc/modules/remote_bitrate_estimator/test/packet_sender.h b/webrtc/modules/remote_bitrate_estimator/test/packet_sender.h
index 0df61b039a4377f6a77e30f3f7490a303a06b9ed..86ad0e812f70d93fcc89859b8f4858482f1e753c 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/packet_sender.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/packet_sender.h
@@ -81,7 +81,6 @@ class VideoSender : public PacketSender, public BitrateObserver {
   void OnNetworkChanged(uint32_t target_bitrate_bps,
                         uint8_t fraction_lost,
                         int64_t rtt) override;
-
   void Pause() override;
   void Resume(int64_t paused_time_ms) override;
 
@@ -123,12 +122,23 @@ class PacedVideoSender : public VideoSender, public PacedSender::PacketSender {
                         uint8_t fraction_lost,
                         int64_t rtt) override;
 
+  void OnNetworkChanged(uint32_t bitrate_for_encoder_bps,
+                        uint32_t bitrate_for_pacer_bps,
+                        bool in_probe_rtt,
+                        int64_t rtt,
+                        uint64_t congestion_window) override;
+  size_t pacer_queue_size_in_bytes() override {
+    return pacer_queue_size_in_bytes_;
+  }
+  void OnBytesAcked(size_t bytes) override;
+
  private:
   int64_t TimeUntilNextProcess(const std::list<Module*>& modules);
   void CallProcess(const std::list<Module*>& modules);
   void QueuePackets(Packets* batch, int64_t end_of_batch_time_us);
 
-  PacedSender pacer_;
+  size_t pacer_queue_size_in_bytes_ = 0;
+  std::unique_ptr<Pacer> pacer_;
   Packets queue_;
   Packets pacer_queue_;