Fix for-in for large indexes and indexes on proxies

src/elements.h

Index: src/elements.h
diff --git a/src/elements.h b/src/elements.h
index e743849ff7085ca641edaaaa65571c9c90f91101..8704fffa70029c004837d2ee297ac4330c3880a9 100644
--- a/src/elements.h
+++ b/src/elements.h
@@ -159,15 +159,8 @@ class ElementsAccessor {
   }
 
   MUST_USE_RESULT virtual MaybeHandle<FixedArray> AddElementsToFixedArray(
-      Handle<Object> receiver, Handle<JSObject> holder, Handle<FixedArray> to,
-      Handle<FixedArrayBase> from, FixedArray::KeyFilter filter) = 0;
-
-  MUST_USE_RESULT inline MaybeHandle<FixedArray> AddElementsToFixedArray(
-      Handle<Object> receiver, Handle<JSObject> holder, Handle<FixedArray> to,
-      FixedArray::KeyFilter filter) {
-    return AddElementsToFixedArray(receiver, holder, to,
-                                   handle(holder->elements()), filter);
-  }
+      Handle<JSObject> receiver, Handle<FixedArray> to,
+      FixedArray::KeyFilter filter) = 0;
 
   // Returns a shared ElementsAccessor for the specified ElementsKind.
   static ElementsAccessor* ForKind(ElementsKind elements_kind) {