We can now name the current VM using the service protocol.

runtime/vm/service.h

Index: runtime/vm/service.h
diff --git a/runtime/vm/service.h b/runtime/vm/service.h
index 4e4ccd24099d4f0d7e13bb4c8a69e2be809a74ab..3fe90fec457c7490dbae3430af1a4beda428c4ff 100644
--- a/runtime/vm/service.h
+++ b/runtime/vm/service.h
@@ -129,6 +129,7 @@ class Service : public AllStatic {
                         const Error& error);
 
   // Well-known streams.
+  static StreamInfo vm_stream;
   static StreamInfo isolate_stream;
   static StreamInfo debug_stream;
   static StreamInfo gc_stream;
@@ -146,6 +147,8 @@ class Service : public AllStatic {
     return stream_cancel_callback_;
   }
 
+  static void PrintJSONForVM(JSONStream* js, bool ref);
+
  private:
   static void InvokeMethod(Isolate* isolate, const Array& message);