Move optional.h to webrtc/api/

webrtc/common_video/h264/h264_bitstream_parser.h

 /*
  *  Copyright (c) 2015 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_COMMON_VIDEO_H264_H264_BITSTREAM_PARSER_H_
 #define WEBRTC_COMMON_VIDEO_H264_H264_BITSTREAM_PARSER_H_
 #include <stddef.h>
 #include <stdint.h>
 
+#include "webrtc/api/optional.h"
 #include "webrtc/common_video/h264/pps_parser.h"
 #include "webrtc/common_video/h264/sps_parser.h"
-#include "webrtc/rtc_base/optional.h"
 
 namespace rtc {
 class BitBufferWriter;
 }
 
 namespace webrtc {
 
 // Stateful H264 bitstream parser (due to SPS/PPS). Used to parse out QP values
 // from the bitstream.
 // TODO(pbos): Unify with RTP SPS parsing and only use one H264 parser.
@@ skipping 27 matching lines @@
   rtc::Optional<SpsParser::SpsState> sps_;
   rtc::Optional<PpsParser::PpsState> pps_;
 
   // Last parsed slice QP.
   rtc::Optional<int32_t> last_slice_qp_delta_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_VIDEO_H264_H264_BITSTREAM_PARSER_H_