Perform probing on network route change.

webrtc/modules/congestion_controller/probe_controller.h

 /*
  *  Copyright (c) 2016 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 19 matching lines @@
 
   void SetBitrates(int64_t min_bitrate_bps,
                    int64_t start_bitrate_bps,
                    int64_t max_bitrate_bps);
 
   void OnNetworkStateChanged(NetworkState state);
 
   void SetEstimatedBitrate(int64_t bitrate_bps);
 
   void EnablePeriodicAlrProbing(bool enable);
+
+  // Resets the ProbeController to a state equivalent to as if it was just
+  // created EXCEPT for |enable_periodic_alr_probing_|.
+  void Reset();
+
   void Process();
 
  private:
   enum class State {
     // Initial state where no probing has been triggered yet.
     kInit,
     // Waiting for probing results to continue further probing.
     kWaitingForProbingResult,
     // Probing is complete.
     kProbingComplete,
@@ skipping 21 matching lines @@
   bool mid_call_probing_waiting_for_result_ GUARDED_BY(&critsect_);
   int64_t mid_call_probing_bitrate_bps_ GUARDED_BY(&critsect_);
   int64_t mid_call_probing_succcess_threshold_ GUARDED_BY(&critsect_);
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(ProbeController);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_CONGESTION_CONTROLLER_PROBE_CONTROLLER_H_