Make sure send and receive deltas are positive for remote estimated probe clusters.

webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_abs_send_time.cc

 /*
  *  Copyright (c) 2013 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 94 matching lines @@
   for (std::list<Probe>::const_iterator it = probes_.begin();
        it != probes_.end();
        ++it) {
     if (prev_send_time >= 0) {
       int send_delta_ms = it->send_time_ms - prev_send_time;
       int recv_delta_ms = it->recv_time_ms - prev_recv_time;
       if (send_delta_ms >= 1 && recv_delta_ms >= 1) {
         ++current.num_above_min_delta;
       }
       if (!IsWithinClusterBounds(send_delta_ms, current)) {
-        if (current.count >= kMinClusterSize)
+        if (current.count >= kMinClusterSize &&
+            current.send_mean_ms > 0.0f &&
+            current.recv_mean_ms > 0.0f) {
           AddCluster(clusters, &current);
+        }
         current = Cluster();
       }
       current.send_mean_ms += send_delta_ms;
       current.recv_mean_ms += recv_delta_ms;
       current.mean_size += it->payload_size;
       ++current.count;
     }
     prev_send_time = it->send_time_ms;
     prev_recv_time = it->recv_time_ms;
   }
-  if (current.count >= kMinClusterSize)
+  if (current.count >= kMinClusterSize &&
+      current.send_mean_ms > 0.0f &&
+      current.recv_mean_ms > 0.0f) {
     AddCluster(clusters, &current);
+  }
 }
 
 std::list<Cluster>::const_iterator
 RemoteBitrateEstimatorAbsSendTime::FindBestProbe(
     const std::list<Cluster>& clusters) const {
   int highest_probe_bitrate_bps = 0;
   std::list<Cluster>::const_iterator best_it = clusters.end();
   for (std::list<Cluster>::const_iterator it = clusters.begin();
        it != clusters.end();
        ++it) {
@@ skipping 263 matching lines @@
   return true;
 }
 
 void RemoteBitrateEstimatorAbsSendTime::SetMinBitrate(int min_bitrate_bps) {
   // Called from both the configuration thread and the network thread. Shouldn't
   // be called from the network thread in the future.
   rtc::CritScope lock(&crit_);
   remote_rate_.SetMinBitrate(min_bitrate_bps);
 }
 }  // namespace webrtc