Make intercepted properties retrievable only by getter to be not enumerable.

src/objects.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2019 matching lines @@
   } else if (!interceptor->getter()->IsUndefined()) {
     v8::NamedPropertyGetter getter =
         v8::ToCData<v8::NamedPropertyGetter>(interceptor->getter());
     LOG(ApiNamedPropertyAccess("interceptor-named-get-has", this, name));
     v8::Handle<v8::Value> result;
     {
       // Leaving JavaScript.
       VMState state(EXTERNAL);
       result = getter(v8::Utils::ToLocal(name_handle), info);
     }
-    if (!result.IsEmpty()) return NONE;
+    if (!result.IsEmpty()) return DONT_ENUM;
   }
   return holder_handle->GetPropertyAttributePostInterceptor(*receiver_handle,
                                                             *name_handle,
                                                             continue_search);
 }
 
 
 PropertyAttributes JSObject::GetPropertyAttributeWithReceiver(
       JSObject* receiver,
       String* key) {
@@ skipping 6657 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 
 } }  // namespace v8::internal