Added implementation of four functions in the BBR congestion controller.

webrtc/modules/remote_bitrate_estimator/test/estimators/min_rtt_filter.h

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/min_rtt_filter.h
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/min_rtt_filter.h b/webrtc/modules/remote_bitrate_estimator/test/estimators/min_rtt_filter.h
index 9f9cfc819011764c7054659502ff121e3e02fa7b..f41a4f0dad57ef9426094c4f51305649fa372e87 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/estimators/min_rtt_filter.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/min_rtt_filter.h
@@ -12,16 +12,6 @@
 #ifndef WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_MIN_RTT_FILTER_H_
 #define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_MIN_RTT_FILTER_H_
 
-#include <climits>
-#include <map>
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "webrtc/logging/rtc_event_log/mock/mock_rtc_event_log.h"
-#include "webrtc/modules/remote_bitrate_estimator/include/send_time_history.h"
-#include "webrtc/modules/remote_bitrate_estimator/test/bwe.h"
-
 namespace webrtc {
 namespace testing {
 namespace bwe {
@@ -32,8 +22,8 @@ class MinRttFilter {
   int64_t min_rtt();
   void UpdateMinRtt(int64_t min_rtt);
 
-  // Checks whether or last discovered min_rtt value
-  // is older than x seconds.
+  // Checks whether or not last discovered min_rtt value is older than x
+  // seconds.
   bool MinRttExpired(int64_t now);
   void set_min_rtt_discovery_time(int64_t discovery_time);
 };