Only use paced packets for estimating bitrate probes.

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

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/remb.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/remb.cc b/webrtc/modules/remote_bitrate_estimator/test/estimators/remb.cc
index fe1a1cd5c227f7ff8924358e558baf298d751ecd..9985083f9f157cf0e3a0638955b4219867419852 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/estimators/remb.cc
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/remb.cc
@@ -96,7 +96,7 @@ void RembReceiver::ReceivePacket(int64_t arrival_time_ms,
     step_ms = std::max<int64_t>(estimator_->TimeUntilNextProcess(), 0);
   }
   estimator_->IncomingPacket(arrival_time_ms, media_packet.payload_size(),
-                             media_packet.header());
+                             media_packet.header(), true);
   clock_.AdvanceTimeMilliseconds(arrival_time_ms - clock_.TimeInMilliseconds());
   ASSERT_TRUE(arrival_time_ms == clock_.TimeInMilliseconds());