Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/statscollector.cc

Index: webrtc/pc/statscollector.cc
diff --git a/webrtc/api/statscollector.cc b/webrtc/pc/statscollector.cc
similarity index 99%
rename from webrtc/api/statscollector.cc
rename to webrtc/pc/statscollector.cc
index 7761d1079a88c2f3a9f58541f71891baedf3a5c3..3e0c2bf4414354fc6d44547aaa97f15252a3f590 100644
--- a/webrtc/api/statscollector.cc
+++ b/webrtc/pc/statscollector.cc
@@ -8,16 +8,16 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/api/statscollector.h"
+#include "webrtc/pc/statscollector.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
-#include "webrtc/api/peerconnection.h"
 #include "webrtc/base/base64.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/pc/channel.h"
+#include "webrtc/pc/peerconnection.h"
 
 namespace webrtc {
 namespace {