Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/datachannel_unittest.cc

Index: webrtc/pc/datachannel_unittest.cc
diff --git a/webrtc/api/datachannel_unittest.cc b/webrtc/pc/datachannel_unittest.cc
similarity index 99%
rename from webrtc/api/datachannel_unittest.cc
rename to webrtc/pc/datachannel_unittest.cc
index 4ce1be573648d4e4515fa1c15e94e68ad085d3aa..13ab63cdfacec72cad4f8471cea0d1ce3bd788db 100644
--- a/webrtc/api/datachannel_unittest.cc
+++ b/webrtc/pc/datachannel_unittest.cc
@@ -10,10 +10,10 @@
 
 #include <memory>
 
-#include "webrtc/api/datachannel.h"
-#include "webrtc/api/sctputils.h"
-#include "webrtc/api/test/fakedatachannelprovider.h"
 #include "webrtc/base/gunit.h"
+#include "webrtc/pc/datachannel.h"
+#include "webrtc/pc/sctputils.h"
+#include "webrtc/pc/test/fakedatachannelprovider.h"
 
 using webrtc::DataChannel;
 using webrtc::SctpSidAllocator;