Keyed stores to super with numeric keys.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c5e036ae6e6137cd9ff23a4608b7ec7718d837c8..3fb23c4b78ca98abf7534b893d61652afb5326dc 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1126,6 +1126,9 @@ class Object {
       StorePropertyMode data_store_mode = NORMAL_PROPERTY);
   MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyProperty(
       LookupIterator* it, Handle<Object> value, StrictMode strict_mode);
+  MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyElement(
+      Isolate* isolate, Handle<Object> receiver, uint32_t index,
+      Handle<Object> value, StrictMode strict_mode);
   static Handle<Object> SetDataProperty(LookupIterator* it,
                                         Handle<Object> value);
   MUST_USE_RESULT static MaybeHandle<Object> AddDataProperty(
@@ -1171,6 +1174,10 @@ class Object {
       Handle<Object> receiver,
       uint32_t index);
 
+  MUST_USE_RESULT static MaybeHandle<Object> SetElementWithReceiver(
+      Isolate* isolate, Handle<Object> object, Handle<Object> receiver,
+      uint32_t index, Handle<Object> value, StrictMode strict_mode);
+
   static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
       Isolate* isolate, Handle<Object> receiver);
 
@@ -2250,17 +2257,17 @@ class JSObject: public JSReceiver {
                                          Handle<JSReceiver> receiver,
                                          uint32_t index, bool continue_search);
   MUST_USE_RESULT static Maybe<PropertyAttributes>
+      GetElementAttributeFromInterceptor(Handle<JSObject> object,
+                                         Handle<Object> receiver,
+                                         uint32_t index);
+  MUST_USE_RESULT static Maybe<PropertyAttributes>
       GetElementAttributeWithoutInterceptor(Handle<JSObject> object,
                                             Handle<JSReceiver> receiver,
                                             uint32_t index,
                                             bool continue_search);
   MUST_USE_RESULT static MaybeHandle<Object> SetElementWithCallback(
-      Handle<JSObject> object,
-      Handle<Object> structure,
-      uint32_t index,
-      Handle<Object> value,
-      Handle<JSObject> holder,
-      StrictMode strict_mode);
+      Handle<Object> object, Handle<Object> structure, uint32_t index,
+      Handle<Object> value, Handle<JSObject> holder, StrictMode strict_mode);
   MUST_USE_RESULT static MaybeHandle<Object> SetElementWithInterceptor(
       Handle<JSObject> object,
       uint32_t index,