Removes redundant members in congestion controller.

last_target_rate_ and current_target_rate_msg_ both kept track of the
same value. pacer_configured_ was not used at all. This CL removes
both last_target_rate_ and pacer_configured_.

Bug: None
Change-Id: Ieb15c38c7d0c44730bef95492e3e677d505f054e
Reviewed-on: https://webrtc-review.googlesource.com/70184
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22909}
diff --git a/modules/congestion_controller/rtp/send_side_congestion_controller.cc b/modules/congestion_controller/rtp/send_side_congestion_controller.cc
index 66867ea..d0e13f3 100644
--- a/modules/congestion_controller/rtp/send_side_congestion_controller.cc
+++ b/modules/congestion_controller/rtp/send_side_congestion_controller.cc
@@ -172,7 +172,6 @@
   void OnPacerQueueUpdate(PacerQueueUpdate msg);
 
   rtc::Optional<TargetTransferRate> last_transfer_rate();
-  bool pacer_configured();
 
  private:
   void OnNetworkInvalidation();
@@ -186,9 +185,6 @@
   NetworkChangedObserver* observer_ = nullptr;
   PacerController* pacer_controller_;
 
-  rtc::Optional<TargetTransferRate> last_target_rate_;
-  bool pacer_configured_ = false;
-
   rtc::Optional<TargetTransferRate> current_target_rate_msg_;
   bool network_available_ = true;
   int64_t last_reported_target_bitrate_bps_ = 0;
@@ -219,7 +215,6 @@
 void ControlHandler::OnPacerConfig(PacerConfig config) {
   RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
   pacer_controller_->OnPacerConfig(config);
-  pacer_configured_ = true;
 }
 
 void ControlHandler::OnProbeClusterConfig(ProbeClusterConfig config) {
@@ -230,7 +225,6 @@
 void ControlHandler::OnTargetTransferRate(TargetTransferRate target_rate) {
   RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
   current_target_rate_msg_ = target_rate;
-  last_target_rate_ = target_rate;
   OnNetworkInvalidation();
 }
 
@@ -312,12 +306,7 @@
 
 rtc::Optional<TargetTransferRate> ControlHandler::last_transfer_rate() {
   RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
-  return last_target_rate_;
-}
-
-bool ControlHandler::pacer_configured() {
-  RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
-  return pacer_configured_;
+  return current_target_rate_msg_;
 }
 }  // namespace send_side_cc_internal