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

webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.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.
  *
  */
 
 #ifndef WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_MAX_BANDWIDTH_FILTER_H_
 #define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_MAX_BANDWIDTH_FILTER_H_
 
-#include <cstddef>
-#include <cstdint>
+#include <climits>
+#include <list>
+#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 {
 class MaxBandwidthFilter {
  public:
   MaxBandwidthFilter();
 
   ~MaxBandwidthFilter();
-  int64_t max_bandwidth_estimate_bytes_per_ms() {
-    return max_bandwidth_estimate_bytes_per_ms_;
-  }
+  int64_t max_bandwidth_estimate_bps() { return max_bandwidth_estimate_bps_; }
 
-  // Save bandwidth sample for the current round. We save bandwidth samples for
-  // past 10 rounds to provide better bandwidth estimate.
+  // Save bandwidth sample for the current round.
+  // We save bandwidth samples for past 10 rounds to
+  // provide better bandwidth estimate.
+
   void AddBandwidthSample(int64_t sample, int64_t round, size_t filter_size);
 
   // Check if bandwidth has grown by certain multiplier for past x rounds,
-  // to decide whether or not full bandwidth was reached.
+  // to decide whether or full bandwidth was reached.
   bool FullBandwidthReached(float growth_target, int max_rounds_without_growth);
 
  private:
   int64_t bandwidth_last_round_bytes_per_ms_;
-  uint64_t round_bandwidth_updated_;
-  int64_t max_bandwidth_estimate_bytes_per_ms_;
+  // uint64_t round_bandwidth_updated_ = 0;
+  int64_t max_bandwidth_estimate_bps_;
   int64_t rounds_without_growth_;
+  std::pair<int64_t, size_t> bandwidth_samples_[3];
 };
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_ESTIMATORS_MAX_BANDWIDTH_FILTER_H_