Added implementation of four functions in the BBR congestion controller.

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

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.h
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.h b/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.h
index ebb2e6e5eea2ac6a65c516e2e09504823af79a19..eb28eec65713bd516b50323305e481d9489b57b4 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.h
@@ -30,7 +30,7 @@ class MinRttFilter;
 class CongestionWindow;
 class BbrBweSender : public BweSender {
  public:
-  BbrBweSender();
+  explicit BbrBweSender(Clock* clock);
   virtual ~BbrBweSender();
   enum Mode {
     // Startup phase.
@@ -64,8 +64,21 @@ class BbrBweSender : public BweSender {
   void TryExitingDrain(int64_t now);
   void EnterProbeBw(int64_t now);
   void EnterProbeRtt(int64_t now);
-  void TryExitingProbeRtt(int64_t now);
   void TryUpdatingCyclePhase(int64_t now);
+  void TryEnteringProbeRtt(int64_t now);
+  void TryExitingProbeRtt(int64_t now);
+  Clock* const clock_;
+  Mode mode_;
+  std::unique_ptr<MaxBandwidthFilter> max_bandwidth_filter_;
+  uint64_t round_count_;
+  uint64_t last_packet_sent_;
+  uint64_t round_trip_end_;
+  float pacing_gain_;
+  float congestion_window_gain_;
+
+  // If optimal bandwidth has been discovered and reached,

[philipel, 2017/06/07 11:34:31]

Use the full 80 char limit for comments.

[gnish1, 2017/06/07 12:30:14]

Done.

+  // (for example after Startup mode) set this variable to true.
+  bool full_bandwidth_reached_;
 };
 
 class BbrBweReceiver : public BweReceiver {