Add AlrDetector

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 c0ec3da0f9a42bca4b75d8e1a18d47c61659e08c..1ecb2b6a406cce010244eb0267c92ee52719db91 100644
--- a/webrtc/modules/congestion_controller/congestion_controller.cc
+++ b/webrtc/modules/congestion_controller/congestion_controller.cc
@@ -23,6 +23,7 @@
 #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
 #include "webrtc/modules/congestion_controller/delay_based_bwe.h"
 #include "webrtc/modules/congestion_controller/probe_controller.h"
+#include "webrtc/modules/pacing/alr_detector.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"
@@ -162,7 +163,9 @@ CongestionController::CongestionController(
     : clock_(clock),
       observer_(observer),
       packet_router_(new PacketRouter()),
-      pacer_(new PacedSender(clock_, packet_router_.get())),
+      alr_detector_(new AlrDetector()),
+      pacer_(
+          new PacedSender(clock_, packet_router_.get(), alr_detector_.get())),
       remote_bitrate_estimator_(
           new WrappingBitrateEstimator(remote_bitrate_observer, clock_)),
       bitrate_controller_(