Use |probe_cluster_id| to cluster packets.

webrtc/modules/congestion_controller/congestion_controller.cc

Index: webrtc/modules/congestion_controller/congestion_controller.cc
diff --git a/webrtc/modules/congestion_controller/congestion_controller.cc b/webrtc/modules/congestion_controller/congestion_controller.cc
index 5767448a5f7bf711a24ef214ea47d5f5cac18f20..3ca0f40539ffefa80d213f3788a2d02aadb6fdb7 100644
--- a/webrtc/modules/congestion_controller/congestion_controller.cc
+++ b/webrtc/modules/congestion_controller/congestion_controller.cc
@@ -20,8 +20,8 @@
 #include "webrtc/base/socket.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
+#include "webrtc/modules/congestion_controller/delay_based_bandwidth_estimator.h"
 #include "webrtc/modules/remote_bitrate_estimator/include/send_time_history.h"
-#include "webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_abs_send_time.h"
 #include "webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream.h"
 #include "webrtc/modules/utility/include/process_thread.h"
 #include "webrtc/system_wrappers/include/critical_section_wrapper.h"
@@ -115,7 +115,7 @@ class WrappingBitrateEstimator : public RemoteBitrateEstimator {
   // Instantiate RBE for Time Offset or Absolute Send Time extensions.
   void PickEstimator() EXCLUSIVE_LOCKS_REQUIRED(crit_sect_.get()) {
     if (using_absolute_send_time_) {
-      rbe_.reset(new RemoteBitrateEstimatorAbsSendTime(observer_));
+      rbe_.reset(new DelayBasedBwe(observer_));
     } else {
       rbe_.reset(new RemoteBitrateEstimatorSingleStream(observer_, clock_));
     }
@@ -207,7 +207,7 @@ CongestionController::~CongestionController() {}
 
 void CongestionController::Init() {
   transport_feedback_adapter_.SetBitrateEstimator(
-      new RemoteBitrateEstimatorAbsSendTime(&transport_feedback_adapter_));
+      new DelayBasedBwe(&transport_feedback_adapter_));
   transport_feedback_adapter_.GetBitrateEstimator()->SetMinBitrate(
       min_bitrate_bps_);
 }