Support correct factory syntax in the VM as decribed in the spec.

runtime/vm/object_test.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 150 matching lines @@
   const Class& factory_class = Class::Handle(Class::New(class_name, script));
   const Array& no_fields = Array::Handle(Array::Empty());
   // Finalizes the class.
   factory_class.SetFields(no_fields);
 
   String& interface_name = String::Handle(String::NewSymbol("MyInterface"));
   const Class& interface =
       Class::Handle(Class::NewInterface(interface_name, script));
   EXPECT(interface.is_interface());
   EXPECT(!factory_class.is_interface());
-  EXPECT_EQ(Object::null(), interface.factory_type());
-  const Type& factory_type =
-      Type::Handle(Type::NewNonParameterizedType(factory_class));
-  interface.set_factory_type(factory_type);
-  EXPECT_EQ(factory_type.raw(), interface.factory_type());
+  EXPECT(!interface.HasFactoryClass());
+  interface.set_factory_class(factory_class);
+  EXPECT_EQ(factory_class.raw(), interface.FactoryClass());
 }
 
 
 TEST_CASE(Smi) {
   const Smi& smi = Smi::Handle(Smi::New(5));
   Object& smi_object = Object::Handle(smi.raw());
   EXPECT(smi.IsSmi());
   EXPECT(smi_object.IsSmi());
   EXPECT_EQ(5, smi.Value());
   const Object& object = Object::Handle();
@@ skipping 1763 matching lines @@
     cls = iterator.GetNextClass();
     ASSERT((cls.raw() == ae66.raw()) || (cls.raw() == re44.raw()));
     count++;
   }
   ASSERT(count == 2);
 }
 
 #endif  // TARGET_ARCH_IA32.
 
 }  // namespace dart