Move optional.h to webrtc/api/

webrtc/modules/congestion_controller/bitrate_estimator.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_CONGESTION_CONTROLLER_BITRATE_ESTIMATOR_H_
 #define WEBRTC_MODULES_CONGESTION_CONTROLLER_BITRATE_ESTIMATOR_H_
 
 #include <vector>
 
-#include "webrtc/rtc_base/optional.h"
+#include "webrtc/api/optional.h"
 
 namespace webrtc {
 
 // Computes a bayesian estimate of the throughput given acks containing
 // the arrival time and payload size. Samples which are far from the current
 // estimate or are based on few packets are given a smaller weight, as they
 // are considered to be more likely to have been caused by, e.g., delay spikes
 // unrelated to congestion.
 class BitrateEstimator {
  public:
@@ skipping 10 matching lines @@
   int sum_;
   int64_t current_win_ms_;
   int64_t prev_time_ms_;
   float bitrate_estimate_;
   float bitrate_estimate_var_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_CONGESTION_CONTROLLER_BITRATE_ESTIMATOR_H_