Move optional.h to webrtc/api/

webrtc/test/fuzzers/audio_processing_fuzzer_configs.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/audio_processing/include/audio_processing.h"
 #include "webrtc/test/fuzzers/audio_processing_fuzzer.h"
 
-#include "webrtc/rtc_base/optional.h"
+#include "webrtc/api/optional.h"
 
 namespace webrtc {
 
 std::unique_ptr<AudioProcessing> CreateAPM(const uint8_t** data,
                                            size_t* remaining_size) {
   // Parse boolean values for optionally enabling different
   // configurable public components of APM.
   auto exp_agc = ParseBool(data, remaining_size);
   auto exp_ns = ParseBool(data, remaining_size);
   auto bf = ParseBool(data, remaining_size);
@@ skipping 36 matching lines @@
   apm->ApplyConfig(apm_config);
 
   return apm;
 }
 
 void FuzzOneInput(const uint8_t* data, size_t size) {
   auto apm = CreateAPM(&data, &size);
   FuzzAudioProcessing(data, size, std::move(apm));
 }
 }  // namespace webrtc