Fix issue where the first audio packets significantly impacts initial BWE negatively.

webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream.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 29 matching lines @@
     InterArrival inter_arrival;
     OveruseEstimator estimator;
     OveruseDetector detector;
   };
 
   RemoteBitrateEstimatorSingleStream::RemoteBitrateEstimatorSingleStream(
       RemoteBitrateObserver* observer,
       Clock* clock,
       uint32_t min_bitrate_bps)
       : clock_(clock),
-        incoming_bitrate_(1000, 8000),
+        incoming_bitrate_(kBitrateWindowMs, 8000),
         remote_rate_(new AimdRateControl(min_bitrate_bps)),
         observer_(observer),
         crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
         last_process_time_(-1),
         process_interval_ms_(kProcessIntervalMs) {
   assert(observer_);
   LOG(LS_INFO) << "RemoteBitrateEstimatorSingleStream: Instantiating.";
 }
 
 RemoteBitrateEstimatorSingleStream::~RemoteBitrateEstimatorSingleStream() {
@@ skipping 162 matching lines @@
   assert(ssrcs);
   ssrcs->resize(overuse_detectors_.size());
   int i = 0;
   for (SsrcOveruseEstimatorMap::const_iterator it = overuse_detectors_.begin();
       it != overuse_detectors_.end(); ++it, ++i) {
     (*ssrcs)[i] = it->first;
   }
 }
 
 }  // namespace webrtc