Fix issue where the number of packets reported in tests/simulations sometimes are negative.

webrtc/modules/remote_bitrate_estimator/test/estimators/remb.h

 /*
  *  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.
  */
 
@@ skipping 58 matching lines @@
   static RTCPReportBlock BuildReportBlock(StreamStatistician* statistician);
   bool LatestEstimate(uint32_t* estimate_bps);
 
   std::string estimate_log_prefix_;
   bool plot_estimate_;
   SimulatedClock clock_;
   std::unique_ptr<ReceiveStatistics> recv_stats_;
   int64_t latest_estimate_bps_;
   int64_t last_feedback_ms_;
   std::unique_ptr<RemoteBitrateEstimator> estimator_;
+  RTCPReportBlock latest_report_block_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RembReceiver);
 };
 
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_REMB_H_