Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/api/peerconnectionfactoryproxy.h

 /*
  *  Copyright 2014 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_PEERCONNECTIONFACTORYPROXY_H_
-#define WEBRTC_API_PEERCONNECTIONFACTORYPROXY_H_
+#ifndef WEBRTC_PC_PEERCONNECTIONFACTORYPROXY_H_
+#define WEBRTC_PC_PEERCONNECTIONFACTORYPROXY_H_
 
 #include <memory>
 #include <string>
 #include <utility>
 
 #include "webrtc/api/peerconnectioninterface.h"
 #include "webrtc/api/proxy.h"
 #include "webrtc/base/bind.h"
 
 namespace webrtc {
@@ skipping 73 matching lines @@
       PeerConnectionObserver* a5) {
     std::unique_ptr<cricket::PortAllocator> ptr_a3(a3);
     std::unique_ptr<rtc::RTCCertificateGeneratorInterface> ptr_a4(a4);
     return c_->CreatePeerConnection(a1, std::move(ptr_a3), std::move(ptr_a4),
                                     a5);
   }
   END_SIGNALING_PROXY()
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_API_PEERCONNECTIONFACTORYPROXY_H_
+#endif  // WEBRTC_PC_PEERCONNECTIONFACTORYPROXY_H_