Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/webrtcsessiondescriptionfactory.h

 /*
  *  Copyright 2013 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_API_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
-#define WEBRTC_API_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
+#ifndef WEBRTC_PC_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
+#define WEBRTC_PC_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
 
 #include <memory>
 
 #include "webrtc/api/peerconnectioninterface.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/messagehandler.h"
 #include "webrtc/base/rtccertificate.h"
 #include "webrtc/base/rtccertificategenerator.h"
 #include "webrtc/p2p/base/transportdescriptionfactory.h"
 #include "webrtc/pc/mediasession.h"
@@ skipping 136 matching lines @@
   const std::unique_ptr<rtc::RTCCertificateGeneratorInterface> cert_generator_;
   // TODO(jiayl): remove the dependency on session once bug 2264 is fixed.
   WebRtcSession* const session_;
   const std::string session_id_;
   CertificateRequestState certificate_request_state_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(WebRtcSessionDescriptionFactory);
 };
 }  // namespace webrtc
 
-#endif  // WEBRTC_API_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
+#endif  // WEBRTC_PC_WEBRTCSESSIONDESCRIPTIONFACTORY_H_