Move optional.h to webrtc/api/

webrtc/modules/audio_processing/aec3/block_processor.cc

 /*
  *  Copyright (c) 2016 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/aec3/block_processor.h"
 
+#include "webrtc/api/optional.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/block_processor_metrics.h"
 #include "webrtc/modules/audio_processing/aec3/echo_path_variability.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
 #include "webrtc/rtc_base/atomicops.h"
 #include "webrtc/rtc_base/constructormagic.h"
-#include "webrtc/rtc_base/optional.h"
 
 namespace webrtc {
 namespace {
 
 enum class BlockProcessorApiCall { kCapture, kRender };
 
 class BlockProcessorImpl final : public BlockProcessor {
  public:
   BlockProcessorImpl(int sample_rate_hz,
                      std::unique_ptr<RenderDelayBuffer> render_buffer,
@@ skipping 176 matching lines @@
     int sample_rate_hz,
     std::unique_ptr<RenderDelayBuffer> render_buffer,
     std::unique_ptr<RenderDelayController> delay_controller,
     std::unique_ptr<EchoRemover> echo_remover) {
   return new BlockProcessorImpl(sample_rate_hz, std::move(render_buffer),
                                 std::move(delay_controller),
                                 std::move(echo_remover));
 }
 
 }  // namespace webrtc