Reset the BWE when the network changes

webrtc/modules/congestion_controller/include/congestion_controller.h

 /*
  *  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 40 matching lines @@
   virtual int64_t GetPacerQueuingDelayMs() const;
   virtual PacedSender* pacer() { return pacer_.get(); }
   virtual PacketRouter* packet_router() { return &packet_router_; }
   virtual TransportFeedbackObserver* GetTransportFeedbackObserver();
 
   virtual void UpdatePacerBitrate(int bitrate_kbps,
                                   int max_bitrate_kbps,
                                   int min_bitrate_kbps);
 
   virtual void OnSentPacket(const rtc::SentPacket& sent_packet);
+  virtual void ResetBweBitrates(int target_bitrate_bps);
 
   // Implements CallStatsObserver.
   void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) override;
 
   // Implements Module.
   int64_t TimeUntilNextProcess() override;
   void Process() override;
 
  private:
   Clock* const clock_;
   const rtc::scoped_ptr<PacedSender> pacer_;
   const rtc::scoped_ptr<RemoteBitrateEstimator> remote_bitrate_estimator_;
   const rtc::scoped_ptr<BitrateController> bitrate_controller_;
   PacketRouter packet_router_;
   RemoteEstimatorProxy remote_estimator_proxy_;
   TransportFeedbackAdapter transport_feedback_adapter_;
   int min_bitrate_bps_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(CongestionController);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_CONGESTION_CONTROLLER_INCLUDE_CONGESTION_CONTROLLER_H_