Fix keyed access of primitive objects in the runtime.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 12eba2ba25f4468a172436daf03d85ac8a252f10..507c7b61e23654c71766a7a3edac486c1c15c4d3 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1229,6 +1229,10 @@ class Object {
       Isolate* isolate, Handle<Object> object, uint32_t index,
       LanguageMode language_mode = SLOPPY);
 
+  MUST_USE_RESULT static inline MaybeHandle<Object> SetElement(
+      Isolate* isolate, Handle<Object> object, uint32_t index,
+      Handle<Object> value, LanguageMode language_mode);
+
   static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
       Isolate* isolate, Handle<Object> receiver);
 
@@ -1671,10 +1675,6 @@ class JSReceiver: public HeapObject {
  public:
   DECLARE_CAST(JSReceiver)
 
-  MUST_USE_RESULT static MaybeHandle<Object> SetElement(
-      Handle<JSReceiver> object, uint32_t index, Handle<Object> value,
-      LanguageMode language_mode);
-
   // Implementation of [[HasProperty]], ECMA-262 5th edition, section 8.12.6.
   MUST_USE_RESULT static inline Maybe<bool> HasProperty(
       Handle<JSReceiver> object, Handle<Name> name);