- First step in refactoring ports with the goal of moving

runtime/include/dart_api.h

Index: runtime/include/dart_api.h
===================================================================
--- runtime/include/dart_api.h	(revision 34429)
+++ runtime/include/dart_api.h	(working copy)
@@ -1089,8 +1089,13 @@
  */
 DART_EXPORT Dart_Handle Dart_NewSendPort(Dart_Port port_id);
 
+
+DART_EXPORT Dart_Handle Dart_PortGetId(Dart_Handle port, Dart_Port* port_id);
+
 /**
- * Gets the ReceivePort for the provided port id, creating it if necessary.
+ * Gets the ReceivePort for the provided port id.
+ * Returns Dart_Null if a port with the provided port id is not associated with
+ * the current isolate.
  *
  * Note that there is at most one ReceivePort for a given port id.
  */