Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/test/mockpeerconnectionobservers.h

Index: webrtc/pc/test/mockpeerconnectionobservers.h
diff --git a/webrtc/api/test/mockpeerconnectionobservers.h b/webrtc/pc/test/mockpeerconnectionobservers.h
similarity index 97%
rename from webrtc/api/test/mockpeerconnectionobservers.h
rename to webrtc/pc/test/mockpeerconnectionobservers.h
index 23647f6de3b5cbf3d5c8e6fda845103c77a04441..9a4287727ed15062238ffb001dfb3b072925aafb 100644
--- a/webrtc/api/test/mockpeerconnectionobservers.h
+++ b/webrtc/pc/test/mockpeerconnectionobservers.h
@@ -10,8 +10,8 @@
 
 // This file contains mock implementations of observers used in PeerConnection.
 
-#ifndef WEBRTC_API_TEST_MOCKPEERCONNECTIONOBSERVERS_H_
-#define WEBRTC_API_TEST_MOCKPEERCONNECTIONOBSERVERS_H_
+#ifndef WEBRTC_PC_TEST_MOCKPEERCONNECTIONOBSERVERS_H_
+#define WEBRTC_PC_TEST_MOCKPEERCONNECTIONOBSERVERS_H_
 
 #include <memory>
 #include <string>
@@ -226,4 +226,4 @@ class MockStatsObserver : public webrtc::StatsObserver {
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_API_TEST_MOCKPEERCONNECTIONOBSERVERS_H_
+#endif  // WEBRTC_PC_TEST_MOCKPEERCONNECTIONOBSERVERS_H_