Reduce logging frequency in bwe simulations.

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

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc b/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
index 3cf7c752a07e911bd680a3c48e0addaf57518ecb..b1e42ac02a25a52c79e2f64525980ca1155eccc3 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
@@ -28,7 +28,8 @@ FullBweSender::FullBweSender(int kbps, BitrateObserver* observer, Clock* clock)
       clock_(clock),
       send_time_history_(clock_, 10000),
       has_received_ack_(false),
-      last_acked_seq_num_(0) {
+      last_acked_seq_num_(0),
+      last_log_time_ms_(0) {
   assert(kbps >= kMinBitrateKbps);
   assert(kbps <= kMaxBitrateKbps);
   bitrate_controller_->SetStartBitrate(1000 * kbps);
@@ -52,7 +53,11 @@ void FullBweSender::GiveFeedback(const FeedbackPacket& feedback) {
   std::vector<PacketInfo> packet_feedback_vector(fb.packet_feedback_vector());
   for (PacketInfo& packet_info : packet_feedback_vector) {
     if (!send_time_history_.GetInfo(&packet_info, true)) {
-      LOG(LS_WARNING) << "Ack arrived too late.";
+      int64_t now_ms = clock_->TimeInMilliseconds();
+      if (now_ms - last_log_time_ms_ > 5000) {
+        LOG(LS_WARNING) << "Ack arrived too late.";
+        last_log_time_ms_ = now_ms;
+      }
     }
   }