Revert of Move delay_based_bwe_ into CongestionController

webrtc/modules/congestion_controller/congestion_controller_unittests_helper.cc

-/*
- *  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.
- */
-
-#include "webrtc/modules/congestion_controller/congestion_controller_unittests_helper.h"
-
-#include "webrtc/base/checks.h"
-#include "webrtc/test/gtest.h"
-
-namespace webrtc {
-void ComparePacketFeedbackVectors(const std::vector<PacketFeedback>& truth,
-                                  const std::vector<PacketFeedback>& input) {
-  ASSERT_EQ(truth.size(), input.size());
-  size_t len = truth.size();
-  // truth contains the input data for the test, and input is what will be
-  // sent to the bandwidth estimator. truth.arrival_tims_ms is used to
-  // populate the transport feedback messages. As these times may be changed
-  // (because of resolution limits in the packets, and because of the time
-  // base adjustment performed by the TransportFeedbackAdapter at the first
-  // packet, the truth[x].arrival_time and input[x].arrival_time may not be
-  // equal. However, the difference must be the same for all x.
-  int64_t arrival_time_delta =
-      truth[0].arrival_time_ms - input[0].arrival_time_ms;
-  for (size_t i = 0; i < len; ++i) {
-    RTC_CHECK(truth[i].arrival_time_ms != PacketFeedback::kNotReceived);
-    if (input[i].arrival_time_ms != PacketFeedback::kNotReceived) {
-      EXPECT_EQ(truth[i].arrival_time_ms,
-                input[i].arrival_time_ms + arrival_time_delta);
-    }
-    EXPECT_EQ(truth[i].send_time_ms, input[i].send_time_ms);
-    EXPECT_EQ(truth[i].sequence_number, input[i].sequence_number);
-    EXPECT_EQ(truth[i].payload_size, input[i].payload_size);
-    EXPECT_EQ(truth[i].pacing_info, input[i].pacing_info);
-  }
-}
-}  // namespace webrtc