Added CPP wrapper for PPB_TCPServerSocket_Private.

ppapi/cpp/private/tcp_socket_private.cc

Index: ppapi/cpp/private/tcp_socket_private.cc
diff --git a/ppapi/cpp/private/tcp_socket_private.cc b/ppapi/cpp/private/tcp_socket_private.cc
index 9e2c1f6ac9136f4d919f288a3c9541fde950066b..1317f6fa4dcd463ebe6e7226e824e927b3afe6b0 100644
--- a/ppapi/cpp/private/tcp_socket_private.cc
+++ b/ppapi/cpp/private/tcp_socket_private.cc
@@ -28,6 +28,10 @@ TCPSocketPrivate::TCPSocketPrivate(const InstanceHandle& instance) {
   }
 }
 
+TCPSocketPrivate::TCPSocketPrivate(PassRef, PP_Resource resource)
+    : Resource(PASS_REF, resource) {
+}
+
 // static
 bool TCPSocketPrivate::IsAvailable() {
   return has_interface<PPB_TCPSocket_Private>();