Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/rtpreceiver.cc

Index: webrtc/pc/rtpreceiver.cc
diff --git a/webrtc/api/rtpreceiver.cc b/webrtc/pc/rtpreceiver.cc
similarity index 98%
rename from webrtc/api/rtpreceiver.cc
rename to webrtc/pc/rtpreceiver.cc
index a5a764c048eb6fe1f836840e468b5816d3f25486..f57babb4d4cf38343c8cffddd249901950f66b22 100644
--- a/webrtc/api/rtpreceiver.cc
+++ b/webrtc/pc/rtpreceiver.cc
@@ -8,13 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/api/rtpreceiver.h"
+#include "webrtc/pc/rtpreceiver.h"
 
 #include "webrtc/api/mediastreamtrackproxy.h"
-#include "webrtc/api/audiotrack.h"
 #include "webrtc/api/videosourceproxy.h"
-#include "webrtc/api/videotrack.h"
 #include "webrtc/base/trace_event.h"
+#include "webrtc/pc/audiotrack.h"
+#include "webrtc/pc/videotrack.h"
 
 namespace webrtc {