text: /*
   *  Copyright 2018 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 RTC_BASE_EXPERIMENTS_FIELD_TRIAL_UNITS_H_
  #define RTC_BASE_EXPERIMENTS_FIELD_TRIAL_UNITS_H_
  
  #include "api/units/data_rate.h"
  #include "api/units/data_size.h"
  #include "api/units/time_delta.h"
  #include "rtc_base/experiments/field_trial_parser.h"
  
  namespace webrtc {
  extern template class FieldTrialParameter<DataRate>;
  extern template class FieldTrialParameter<DataSize>;
  extern template class FieldTrialParameter<TimeDelta>;
  
  extern template class FieldTrialConstrained<DataRate>;
  extern template class FieldTrialConstrained<DataSize>;
  extern template class FieldTrialConstrained<TimeDelta>;
  
  extern template class FieldTrialOptional<DataRate>;
  extern template class FieldTrialOptional<DataSize>;
  extern template class FieldTrialOptional<TimeDelta>;
  }  // namespace webrtc
  
  #endif  // RTC_BASE_EXPERIMENTS_FIELD_TRIAL_UNITS_H_
  