Add logging of delay-based bandwidth estimate.

webrtc/modules/congestion_controller/transport_feedback_adapter.h

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_MODULES_CONGESTION_CONTROLLER_TRANSPORT_FEEDBACK_ADAPTER_H_
 #define WEBRTC_MODULES_CONGESTION_CONTROLLER_TRANSPORT_FEEDBACK_ADAPTER_H_
 
 #include <memory>
 #include <vector>
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/base/thread_checker.h"
 #include "webrtc/modules/congestion_controller/delay_based_bwe.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/remote_bitrate_estimator/include/send_time_history.h"
 
 namespace webrtc {
 
 class BitrateController;
+class RtcEventLog;
 class ProcessThread;
 
 class TransportFeedbackAdapter : public TransportFeedbackObserver,
                                  public CallStatsObserver {
  public:
-  TransportFeedbackAdapter(Clock* clock, BitrateController* bitrate_controller);
+  TransportFeedbackAdapter(RtcEventLog* event_log,
+                           Clock* clock,
+                           BitrateController* bitrate_controller);
   virtual ~TransportFeedbackAdapter();
 
   void InitBwe();
   // Implements TransportFeedbackObserver.
   void AddPacket(uint16_t sequence_number,
                  size_t length,
                  int probe_cluster_id) override;
   void OnSentPacket(uint16_t sequence_number, int64_t send_time_ms);
 
   // TODO(holmer): This method should return DelayBasedBwe::Result so that we
@@ skipping 14 matching lines @@
  private:
   std::vector<PacketInfo> GetPacketFeedbackVector(
       const rtcp::TransportFeedback& feedback);
 
   const bool send_side_bwe_with_overhead_;
   rtc::CriticalSection lock_;
   rtc::CriticalSection bwe_lock_;
   int transport_overhead_bytes_per_packet_ GUARDED_BY(&lock_);
   SendTimeHistory send_time_history_ GUARDED_BY(&lock_);
   std::unique_ptr<DelayBasedBwe> delay_based_bwe_ GUARDED_BY(&bwe_lock_);
+  RtcEventLog* const event_log_;
   Clock* const clock_;
   int64_t current_offset_ms_;
   int64_t last_timestamp_us_;
   BitrateController* const bitrate_controller_;
   std::vector<PacketInfo> last_packet_feedback_vector_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_CONGESTION_CONTROLLER_TRANSPORT_FEEDBACK_ADAPTER_H_