Added implementation of four functions in the BBR congestion controller.

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

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.h
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.h b/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.h
index 84fab2cc52529e39cb2482c6cd1a1b1a4f7e7ad4..e4547f9282888adb044f0cf57421542b8feb982b 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.h
@@ -30,7 +30,7 @@ class MaxBandwidthFilter {
  public:
   MaxBandwidthFilter();
   ~MaxBandwidthFilter();
-  int64_t max_bandwidth_estimate();
+  int64_t max_bandwidth_estimate() { return max_bandwidth_estimate_; }
 
   // Save bandwidth sample for the current round.
   // We save bandwidth samples for past 10 rounds to
@@ -39,8 +39,13 @@ class MaxBandwidthFilter {
   void AddBandwidthSample(int64_t round);
 
   // Check if bandwidth has grown by certain multiplier for past x rounds,
-  // to decide whether or not delivery rate plateaued.
-  bool DeliveryRateGrows();
+  // to decide whether or full bandwidth was reached.
+  bool FullBandwidthReached(float growth_target, int max_rounds_without_growth);
+
+ private:
+  int64_t bandwidth_last_round_;
+  int64_t max_bandwidth_estimate_;
+  int64_t rounds_without_growth_;
 };
 }  // namespace bwe
 }  // namespace testing