Resubmit reverted r17962, but, for now, only report error about unfinalized

runtime/vm/object_test.cc

Index: runtime/vm/object_test.cc
===================================================================
--- runtime/vm/object_test.cc	(revision 18032)
+++ runtime/vm/object_test.cc	(working copy)
@@ -2589,7 +2589,7 @@
   const String& function_name = String::Handle(Symbols::New("foo"));
   function = Function::NewClosureFunction(function_name, parent, 0);
   const Class& signature_class = Class::Handle(
-      Class::NewSignatureClass(function_name, function, script));
+      Class::NewSignatureClass(function_name, function, script, 0));
   const Instance& closure = Instance::Handle(Closure::New(function, context));
   const Class& closure_class = Class::Handle(closure.clazz());
   EXPECT(closure_class.IsSignatureClass());