Relanding "Pass time constant to bwe smoothing filter."

webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc

 /*
  *  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.
  */
 
 #include "webrtc/logging/rtc_event_log/rtc_event_log.h"
 #include "webrtc/modules/congestion_controller/include/congestion_controller.h"
 #include "webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 
 namespace webrtc {
 
 class NullBitrateObserver : public CongestionController::Observer,
                             public RemoteBitrateObserver {
  public:
   ~NullBitrateObserver() override {}
+
+  // TODO(minyue): remove this when old OnNetworkChanged is deprecated. See
+  // https://bugs.chromium.org/p/webrtc/issues/detail?id=6796
+  using CongestionController::Observer::OnNetworkChanged;
+
   void OnNetworkChanged(uint32_t bitrate_bps,
                         uint8_t fraction_loss,
-                        int64_t rtt_ms) override {}
+                        int64_t rtt_ms,
+                        int64_t probing_interval_ms) override {}
   void OnReceiveBitrateChanged(const std::vector<uint32_t>& ssrcs,
                                uint32_t bitrate) override {}
 };
 
 void FuzzOneInput(const uint8_t* data, size_t size) {
   size_t i = 0;
   if (size < sizeof(int64_t) + sizeof(uint8_t) + sizeof(uint32_t))
     return;
   SimulatedClock clock(data[i++]);
   NullBitrateObserver observer;
@@ skipping 18 matching lines @@
         ByteReader<uint16_t>::ReadBigEndian(&data[i]);
     i += sizeof(uint16_t);
     rbe->IncomingPacket(arrival_time_ms, payload_size, header);
     clock.AdvanceTimeMilliseconds(5);
     arrival_time_ms += ByteReader<uint8_t>::ReadBigEndian(&data[i]);
     arrival_time_ms += sizeof(uint8_t);
   }
   rbe->Process();
 }
 }  // namespace webrtc