Class methods should be non enumerable

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 38b4b82d2ebf9218bff916a7c20b7191ec345b28..286f6fb798a0bb5175f962ac54a48366782cfd19 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1113,7 +1113,7 @@ class Object {
                                           Handle<Context> context);
 
   // Converts this to a Smi if possible.
-  static MUST_USE_RESULT inline MaybeHandle<Smi> ToSmi(Isolate* isolate,
+  MUST_USE_RESULT static inline MaybeHandle<Smi> ToSmi(Isolate* isolate,
                                                        Handle<Object> object);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetProperty(LookupIterator* it);
@@ -1932,10 +1932,14 @@ class JSObject: public JSReceiver {
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       LanguageMode language_mode, bool check_prototype);
 
-  MUST_USE_RESULT static MaybeHandle<Object> SetOwnElement(
+  MUST_USE_RESULT static inline MaybeHandle<Object> SetOwnElement(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       LanguageMode language_mode);
 
+  MUST_USE_RESULT static MaybeHandle<Object> SetOwnElement(
+      Handle<JSObject> object, uint32_t index, Handle<Object> value,
+      PropertyAttributes attributes, LanguageMode language_mode);
+
   // Empty handle is returned if the element cannot be set to the given value.
   MUST_USE_RESULT static MaybeHandle<Object> SetElement(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,