Improve computational performance of BWE by switching list to deque.

webrtc/modules/congestion_controller/trendline_estimator.h

Index: webrtc/modules/congestion_controller/trendline_estimator.h
diff --git a/webrtc/modules/congestion_controller/trendline_estimator.h b/webrtc/modules/congestion_controller/trendline_estimator.h
index 7ca9b7d072beaf60fc3d6d202a191d5b3eb39136..f09ccb5629a1eb1a3c10ee74aace15be88d462ee 100644
--- a/webrtc/modules/congestion_controller/trendline_estimator.h
+++ b/webrtc/modules/congestion_controller/trendline_estimator.h
@@ -13,7 +13,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <list>
+#include <deque>
 #include <utility>
 
 #include "webrtc/base/constructormagic.h"
@@ -61,7 +61,7 @@ class TrendlineEstimator {
   double accumulated_delay_;
   double smoothed_delay_;
   // Linear least squares regression.
-  std::list<std::pair<double, double>> delay_hist_;
+  std::deque<std::pair<double, double>> delay_hist_;
   double trendline_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(TrendlineEstimator);