Cleanup API property handling

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 72d9265b485f090124dd9628f9fbd49a89a48f5e..b3c32ff870d711fc873de82be3b46c87ec0fe0e0 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1681,6 +1681,9 @@ class JSReceiver: public HeapObject {
       Handle<JSReceiver> object, uint32_t index);
 
   // Implementation of [[Delete]], ECMA-262 5th edition, section 8.12.7.
+  MUST_USE_RESULT static MaybeHandle<Object> DeletePropertyOrElement(
+      Handle<JSReceiver> object, Handle<Name> name,
+      LanguageMode language_mode = SLOPPY);
   MUST_USE_RESULT static MaybeHandle<Object> DeleteProperty(
       Handle<JSReceiver> object, Handle<Name> name,
       LanguageMode language_mode = SLOPPY);