Only use payload size within the receive/send interval for bitrate probing.

webrtc/modules/congestion_controller/probe_bitrate_estimator_unittest.cc

 /*
  *  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 105 matching lines @@
   AddPacketFeedback(1, 1000, 75, 90);
 
   EXPECT_NEAR(measured_bps_, 1200000, 10);
 
   // Coming in 6s later
   AddPacketFeedback(0, 1000, 40 + 6000, 60 + 6000);
 
   EXPECT_EQ(measured_bps_, INVALID_BPS);
 }
 
+TEST_F(TestProbeBitrateEstimator, IgnoreSizeLastSendPacket) {
+  AddPacketFeedback(0, 1000, 0, 10);
+  AddPacketFeedback(0, 1000, 10, 20);
+  AddPacketFeedback(0, 1000, 20, 30);
+  AddPacketFeedback(0, 1000, 30, 40);
+  AddPacketFeedback(0, 1500, 40, 50);
+
+  EXPECT_NEAR(measured_bps_, 800000, 10);
+}
+
+TEST_F(TestProbeBitrateEstimator, IgnoreSizeFirstReceivePacket) {
+  AddPacketFeedback(0, 1500, 0, 10);
+  AddPacketFeedback(0, 1000, 10, 20);
+  AddPacketFeedback(0, 1000, 20, 30);
+  AddPacketFeedback(0, 1000, 30, 40);
+
+  EXPECT_NEAR(measured_bps_, 800000, 10);
+}
+
 }  // namespace webrtc