Move optional.h to webrtc/api/

webrtc/p2p/quic/quictransportchannel.h

 /*
  *  Copyright 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_P2P_QUIC_QUICTRANSPORTCHANNEL_H_
 #define WEBRTC_P2P_QUIC_QUICTRANSPORTCHANNEL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "net/quic/quic_crypto_client_stream.h"
 #include "net/quic/quic_packet_writer.h"
+#include "webrtc/api/optional.h"
 #include "webrtc/p2p/base/transportchannelimpl.h"
 #include "webrtc/p2p/quic/quicconnectionhelper.h"
 #include "webrtc/p2p/quic/quicsession.h"
 #include "webrtc/rtc_base/constructormagic.h"
-#include "webrtc/rtc_base/optional.h"
 
 namespace cricket {
 
 enum QuicTransportState {
   // Haven't started QUIC handshake.
   QUIC_TRANSPORT_NEW = 0,
   // Started QUIC handshake.
   QUIC_TRANSPORT_CONNECTING,
   // Negotiated, and has an encrypted connection.
   QUIC_TRANSPORT_CONNECTED,
@@ skipping 264 matching lines @@
   rtc::scoped_refptr<rtc::RTCCertificate> local_certificate_;
   // Fingerprint of the remote peer. This must be set before we start QUIC.
   rtc::Optional<RemoteFingerprint> remote_fingerprint_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(QuicTransportChannel);
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_QUIC_QUICTRANSPORTCHANNEL_H_