Added implementation of three classes in BBR,with unit-tests.

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

 /*
  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  *
  */
@@ skipping 39 matching lines @@
   void OnPacketsSent(const Packets& packets) override;
   int GetFeedbackIntervalMs() const override;
   void GiveFeedback(const FeedbackPacket& feedback) override;
   int64_t TimeUntilNextProcess() override;
   void Process() override;
 
  private:
   void EnterStartup();
   bool UpdateBandwidthAndMinRtt();
   void TryExitingStartup();
-  void TryExitingDrain(int64_t now);
-  void EnterProbeBw(int64_t now);
-  void EnterProbeRtt(int64_t now);
-  void TryUpdatingCyclePhase(int64_t now);
-  void TryEnteringProbeRtt(int64_t now);
-  void TryExitingProbeRtt(int64_t now);
+  void TryExitingDrain(int64_t now_ms);
+  void EnterProbeBw(int64_t now_ms);
+  void EnterProbeRtt(int64_t now_ms);
+  void TryUpdatingCyclePhase(int64_t now_ms);
+  void TryEnteringProbeRtt(int64_t now_ms);
+  void TryExitingProbeRtt(int64_t now_ms);
   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, (for example after
@@ skipping 10 matching lines @@
   FeedbackPacket* GetFeedback(int64_t now_ms) override;
 
  private:
   SimulatedClock clock_;
 };
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_BBR_H_