Revert of Log created probe clusters to RtcEventLog.

webrtc/modules/congestion_controller/send_side_congestion_controller.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 35 matching lines @@
 
 SendSideCongestionController::SendSideCongestionController(
     const Clock* clock,
     Observer* observer,
     RtcEventLog* event_log,
     PacketRouter* packet_router)
     : SendSideCongestionController(
           clock,
           observer,
           event_log,
-          std::unique_ptr<PacedSender>(
-              new PacedSender(clock, packet_router, event_log))) {}
+          std::unique_ptr<PacedSender>(new PacedSender(clock, packet_router))) {
+}
 
 SendSideCongestionController::SendSideCongestionController(
     const Clock* clock,
     Observer* observer,
     RtcEventLog* event_log,
     std::unique_ptr<PacedSender> pacer)
     : clock_(clock),
       observer_(observer),
       event_log_(event_log),
       pacer_(std::move(pacer)),
@@ skipping 228 matching lines @@
 bool SendSideCongestionController::IsSendQueueFull() const {
   return pacer_->ExpectedQueueTimeMs() > PacedSender::kMaxQueueLengthMs;
 }
 
 bool SendSideCongestionController::IsNetworkDown() const {
   rtc::CritScope cs(&network_state_lock_);
   return network_state_ == kNetworkDown;
 }
 
 }  // namespace webrtc