Improve computational performance of BWE by switching list to deque.

webrtc/modules/congestion_controller/median_slope_estimator.h

Index: webrtc/modules/congestion_controller/median_slope_estimator.h
diff --git a/webrtc/modules/congestion_controller/median_slope_estimator.h b/webrtc/modules/congestion_controller/median_slope_estimator.h
index c36fdbeff0808b8815b0878caecc461a2364d8bc..3a13ec71ab4bbd2fd0767c5926bbf1afebb8e785 100644
--- a/webrtc/modules/congestion_controller/median_slope_estimator.h
+++ b/webrtc/modules/congestion_controller/median_slope_estimator.h
@@ -13,7 +13,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <list>
+#include <deque>
 #include <vector>
 
 #include "webrtc/base/constructormagic.h"
@@ -63,7 +63,7 @@ class MedianSlopeEstimator {
   unsigned int num_of_deltas_;
   // Theil-Sen robust line fitting
   double accumulated_delay_;
-  std::list<DelayInfo> delay_hist_;
+  std::deque<DelayInfo> delay_hist_;
   PercentileFilter<double> median_filter_;
   double trendline_;