Move optional.h to webrtc/api/

webrtc/media/base/h264_profile_level_id.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_MEDIA_BASE_H264_PROFILE_LEVEL_ID_H_
 #define WEBRTC_MEDIA_BASE_H264_PROFILE_LEVEL_ID_H_
 
 #include <map>
 #include <string>
 
+#include "webrtc/api/optional.h"
 #include "webrtc/common_types.h"
-#include "webrtc/rtc_base/optional.h"
 
 namespace webrtc {
 namespace H264 {
 
 // Map containting SDP codec parameters.
 typedef std::map<std::string, std::string> CodecParameterMap;
 
 // All values are equal to ten times the level number, except level 1b which is
 // special.
 enum Level {
@@ skipping 64 matching lines @@
 // profile-level-id and level-asymmetry-allowed.
 void GenerateProfileLevelIdForAnswer(
     const CodecParameterMap& local_supported_params,
     const CodecParameterMap& remote_offered_params,
     CodecParameterMap* answer_params);
 
 }  // namespace H264
 }  // namespace webrtc
 
 #endif  // WEBRTC_MEDIA_BASE_H264_PROFILE_LEVEL_ID_H_