Enable adaptive threshold experiment by default.

webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc

 /*
  *  Copyright (c) 2014 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.
  */
 
@@ skipping 26 matching lines @@
       rate_control_state_(kRcHold),
       rate_control_region_(kRcMaxUnknown),
       time_last_bitrate_change_(-1),
       current_input_(kBwNormal, 0, 1.0),
       updated_(false),
       time_first_incoming_estimate_(-1),
       bitrate_is_initialized_(false),
       beta_(0.85f),
       rtt_(kDefaultRttMs),
       time_of_last_log_(-1),
-      in_experiment_(AdaptiveThresholdExperimentIsEnabled()) {}
+      in_experiment_(!AdaptiveThresholdExperimentIsDisabled()) {}
 
 void AimdRateControl::SetMinBitrate(int min_bitrate_bps) {
   min_configured_bitrate_bps_ = min_bitrate_bps;
   current_bitrate_bps_ = std::max<int>(min_bitrate_bps, current_bitrate_bps_);
 }
 
 bool AimdRateControl::ValidEstimate() const {
   return bitrate_is_initialized_;
 }
 
@@ skipping 246 matching lines @@
 }
 
 void AimdRateControl::ChangeRegion(RateControlRegion region) {
   rate_control_region_ = region;
 }
 
 void AimdRateControl::ChangeState(RateControlState new_state) {
   rate_control_state_ = new_state;
 }
 }  // namespace webrtc