Revert of Remove SendPacer from ViEEncoder

webrtc/modules/bitrate_controller/bitrate_controller_impl.h

 /*
  *  Copyright (c) 2012 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.
  *
  *  Usage: this class will register multiple RtcpBitrateObserver's one at each
@@ skipping 10 matching lines @@
 #include <utility>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.h"
 
 namespace webrtc {
 
 class BitrateControllerImpl : public BitrateController {
  public:
-  // TODO(perkj): BitrateObserver has been deprecated and is not used in WebRTC.
-  // |observer| is left for project that is not yet updated.
   BitrateControllerImpl(Clock* clock, BitrateObserver* observer);
   virtual ~BitrateControllerImpl() {}
 
   bool AvailableBandwidth(uint32_t* bandwidth) const override;
 
   RtcpBandwidthObserver* CreateRtcpBandwidthObserver() override;
 
   // Deprecated
   void SetStartBitrate(int start_bitrate_bps) override;
   // Deprecated
   void SetMinMaxBitrate(int min_bitrate_bps, int max_bitrate_bps) override;
 
   void SetBitrates(int start_bitrate_bps,
                    int min_bitrate_bps,
                    int max_bitrate_bps) override;
 
   void UpdateDelayBasedEstimate(uint32_t bitrate_bps) override;
 
   void SetReservedBitrate(uint32_t reserved_bitrate_bps) override;
 
   void SetEventLog(RtcEventLog* event_log) override;
 
-  // Returns true if the parameters have changed since the last call.
-  bool GetNetworkParameters(uint32_t* bitrate,
-                            uint8_t* fraction_loss,
-                            int64_t* rtt) override;
-
   int64_t TimeUntilNextProcess() override;
   void Process() override;
 
  private:
   class RtcpBandwidthObserverImpl;
 
   // Called by BitrateObserver's direct from the RTCP module.
   void OnReceivedEstimatedBitrate(uint32_t bitrate);
 
   void OnReceivedRtcpReceiverReport(uint8_t fraction_loss,
                                     int64_t rtt,
                                     int number_of_packets,
                                     int64_t now_ms);
 
-  // Deprecated
   void MaybeTriggerOnNetworkChanged();
 
+  // Returns true if the parameters have changed since the last call.
+  bool GetNetworkParameters(uint32_t* bitrate,
+                            uint8_t* fraction_loss,
+                            int64_t* rtt);
+
   void OnNetworkChanged(uint32_t bitrate,
                         uint8_t fraction_loss,  // 0 - 255.
                         int64_t rtt) EXCLUSIVE_LOCKS_REQUIRED(critsect_);
 
   // Used by process thread.
-  Clock* const clock_;
-  BitrateObserver* const observer_;
+  Clock* clock_;
+  BitrateObserver* observer_;
   int64_t last_bitrate_update_ms_;
 
   rtc::CriticalSection critsect_;
   SendSideBandwidthEstimation bandwidth_estimation_ GUARDED_BY(critsect_);
   uint32_t reserved_bitrate_bps_ GUARDED_BY(critsect_);
 
   uint32_t last_bitrate_bps_ GUARDED_BY(critsect_);
   uint8_t last_fraction_loss_ GUARDED_BY(critsect_);
   int64_t last_rtt_ms_ GUARDED_BY(critsect_);
   uint32_t last_reserved_bitrate_bps_ GUARDED_BY(critsect_);
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(BitrateControllerImpl);
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_BITRATE_CONTROLLER_BITRATE_CONTROLLER_IMPL_H_