Move optional.h to webrtc/api/

webrtc/p2p/base/port.h

 /*
  *  Copyright 2004 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_P2P_BASE_PORT_H_
 #define WEBRTC_P2P_BASE_PORT_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
+#include "webrtc/api/optional.h"
 #include "webrtc/p2p/base/candidate.h"
 #include "webrtc/p2p/base/candidatepairinterface.h"
 #include "webrtc/p2p/base/jseptransport.h"
 #include "webrtc/p2p/base/packetlossestimator.h"
 #include "webrtc/p2p/base/packetsocketfactory.h"
 #include "webrtc/p2p/base/portinterface.h"
 #include "webrtc/p2p/base/stun.h"
 #include "webrtc/p2p/base/stunrequest.h"
 #include "webrtc/rtc_base/asyncpacketsocket.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/network.h"
-#include "webrtc/rtc_base/optional.h"
 #include "webrtc/rtc_base/proxyinfo.h"
 #include "webrtc/rtc_base/ratetracker.h"
 #include "webrtc/rtc_base/sigslot.h"
 #include "webrtc/rtc_base/socketaddress.h"
 #include "webrtc/rtc_base/thread.h"
 
 namespace cricket {
 
 class Connection;
 class ConnectionRequest;
@@ skipping 706 matching lines @@
            const rtc::PacketOptions& options) override;
   int GetError() override { return error_; }
 
  private:
   int error_ = 0;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_PORT_H_