Remove GetFeedbackInterval in sender side BWE.

webrtc/modules/congestion_controller/delay_based_bwe.h

Index: webrtc/modules/congestion_controller/delay_based_bwe.h
diff --git a/webrtc/modules/congestion_controller/delay_based_bwe.h b/webrtc/modules/congestion_controller/delay_based_bwe.h
index 5ae60f7d21255480eb95fe2ebb65c64087f60434..57f089e9ec2a9928b5440dea9f0d0f4c64a424d2 100644
--- a/webrtc/modules/congestion_controller/delay_based_bwe.h
+++ b/webrtc/modules/congestion_controller/delay_based_bwe.h
@@ -79,16 +79,20 @@ class DelayBasedBwe {
     float bitrate_estimate_var_;
     RateStatistics old_estimator_;
     const bool in_experiment_;
+    bool last_result_was_valid_;
   };
 
-  Result IncomingPacketFeedback(const PacketFeedback& packet_feedback);
+  void IncomingPacketFeedback(const PacketFeedback& packet_feedback);
   Result OnLongFeedbackDelay(int64_t arrival_time_ms);
+
+  Result MaybeUpdateEstimate(bool overusing);
   // Updates the current remote rate estimate and returns true if a valid
   // estimate exists.
-  bool UpdateEstimate(int64_t packet_arrival_time_ms,
-                      int64_t now_ms,
+  bool UpdateEstimate(int64_t now_ms,
                       rtc::Optional<uint32_t> acked_bitrate_bps,
-                      uint32_t* target_bitrate_bps);
+                      bool overusing,
+                      Result* result);
+
   const bool in_trendline_experiment_;
   const bool in_median_slope_experiment_;
 
@@ -101,7 +105,6 @@ class DelayBasedBwe {
   std::unique_ptr<MedianSlopeEstimator> median_slope_estimator_;
   OveruseDetector detector_;
   BitrateEstimator receiver_incoming_bitrate_;
-  int64_t last_update_ms_;
   int64_t last_seen_packet_ms_;
   bool uma_recorded_;
   AimdRateControl rate_control_;