Revert of Test and fix for huge bwe drop after alr state.

webrtc/modules/congestion_controller/acknowledged_bitrate_estimator.h

Index: webrtc/modules/congestion_controller/acknowledged_bitrate_estimator.h
diff --git a/webrtc/modules/congestion_controller/acknowledged_bitrate_estimator.h b/webrtc/modules/congestion_controller/acknowledged_bitrate_estimator.h
deleted file mode 100644
index afed1dcac0368f415ac6659da31f76d38e5e9d63..0000000000000000000000000000000000000000
--- a/webrtc/modules/congestion_controller/acknowledged_bitrate_estimator.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- *  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_CONGESTION_CONTROLLER_ACKNOWLEDGED_BITRATE_ESTIMATOR_H_
-#define WEBRTC_MODULES_CONGESTION_CONTROLLER_ACKNOWLEDGED_BITRATE_ESTIMATOR_H_
-
-#include <memory>
-#include <vector>
-
-#include "webrtc/base/optional.h"
-#include "webrtc/modules/congestion_controller/bitrate_estimator.h"
-
-namespace webrtc {
-
-struct PacketFeedback;
-
-class BitrateEstimatorCreator {
- public:
-  virtual ~BitrateEstimatorCreator() = default;
-  virtual std::unique_ptr<BitrateEstimator> Create();
-};
-
-class AcknowledgedBitrateEstimator {
- public:
-  explicit AcknowledgedBitrateEstimator(
-      std::unique_ptr<BitrateEstimatorCreator> bitrate_estimator_creator);
-
-  AcknowledgedBitrateEstimator();
-
-  void IncomingPacketFeedbackVector(
-      const std::vector<PacketFeedback>& packet_feedback_vector,
-      bool currently_in_alr);
-  rtc::Optional<uint32_t> bitrate_bps() const;
-
- private:
-  bool SentBeforeAlrEnded(const PacketFeedback& packet);
-  bool AlrEnded(bool currently_in_alr) const;
-  void MaybeResetBitrateEstimator(bool currently_in_alr);
-
-  bool was_in_alr_;
-  rtc::Optional<int64_t> alr_ended_time_ms_;
-  const std::unique_ptr<BitrateEstimatorCreator> bitrate_estimator_creator_;
-  std::unique_ptr<BitrateEstimator> bitrate_estimator_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_CONGESTION_CONTROLLER_ACKNOWLEDGED_BITRATE_ESTIMATOR_H_