Move optional.h to webrtc/api/

webrtc/common_video/h264/pps_parser.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_COMMON_VIDEO_H264_PPS_PARSER_H_
 #define WEBRTC_COMMON_VIDEO_H264_PPS_PARSER_H_
 
-#include "webrtc/rtc_base/optional.h"
+#include "webrtc/api/optional.h"
 
 namespace rtc {
 class BitBuffer;
 }
 
 namespace webrtc {
 
 // A class for parsing out picture parameter set (PPS) data from a H264 NALU.
 class PpsParser {
  public:
@@ skipping 28 matching lines @@
   // performed.
   static rtc::Optional<PpsState> ParseInternal(rtc::BitBuffer* bit_buffer);
   static bool ParsePpsIdsInternal(rtc::BitBuffer* bit_buffer,
                                   uint32_t* pps_id,
                                   uint32_t* sps_id);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_VIDEO_H264_PPS_PARSER_H_