Revert "Reland of Remove SendPacer from ViEEncoder

webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc

 /*
  *  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.
  */
 
 #include <algorithm>
 #include <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
-#include "webrtc/modules/pacing/mock/mock_paced_sender.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 
-using ::testing::Exactly;
-using ::testing::Return;
-
+using webrtc::RtcpBandwidthObserver;
+using webrtc::BitrateObserver;
 using webrtc::BitrateController;
-using webrtc::BitrateObserver;
-using webrtc::PacedSender;
-using webrtc::RtcpBandwidthObserver;
 
 uint8_t WeightedLoss(int num_packets1, uint8_t fraction_loss1,
                      int num_packets2, uint8_t fraction_loss2) {
   int weighted_sum = num_packets1 * fraction_loss1 +
       num_packets2 * fraction_loss2;
   int total_num_packets = num_packets1 + num_packets2;
   return (weighted_sum + total_num_packets / 2) / total_num_packets;
 }
 
 webrtc::RTCPReportBlock CreateReportBlock(
@@ skipping 360 matching lines @@
   EXPECT_EQ(120000, bitrate_observer_.last_bitrate_);
   controller_->SetReservedBitrate(50000);
   bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
   // Limited by min bitrate.
   EXPECT_EQ(100000, bitrate_observer_.last_bitrate_);
 
   controller_->SetReservedBitrate(10000);
   bandwidth_observer_->OnReceivedEstimatedBitrate(1);
   EXPECT_EQ(100000, bitrate_observer_.last_bitrate_);
 }