Revert of Remove GetAttributes from the mix to avoid another virtual dispatch.

src/lookup-inl.h

Index: src/lookup-inl.h
diff --git a/src/lookup-inl.h b/src/lookup-inl.h
index 5fddccec2bc5bf18aeca4316733634beef972f10..e169e288caf7b0d4af05ffc60b3665cc7dd3344d 100644
--- a/src/lookup-inl.h
+++ b/src/lookup-inl.h
@@ -72,8 +72,12 @@
 
           ElementsAccessor* accessor = js_object->GetElementsAccessor();
           FixedArrayBase* backing_store = js_object->elements();
-          number_ = accessor->GetIndexForKey(js_object, backing_store, index_);
+          number_ = accessor->GetIndexForKey(backing_store, index_);
           if (number_ == kMaxUInt32) return NOT_FOUND;
+          if (accessor->GetAttributes(js_object, index_, backing_store) ==
+              ABSENT) {
+            return NOT_FOUND;
+          }
           property_details_ = accessor->GetDetails(backing_store, number_);
         }
       } else if (holder->IsGlobalObject()) {