Handlify PrepareSlowElementsForSort and JSArrayUpdateLengthFromIndex.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index d04c94b070146660a4529aaa2d12cfe1c5ab46b8..83cb0d9131beea8fa5f42b431c7aaa9b85e64c7d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2242,10 +2242,10 @@ class JSObject: public JSReceiver {
   static Handle<Object> PrepareElementsForSort(Handle<JSObject> object,
                                                uint32_t limit);
   // As PrepareElementsForSort, but only on objects where elements is
-  // a dictionary, and it will stay a dictionary.
+  // a dictionary, and it will stay a dictionary.  Collates undefined and
+  // unexisting elements below limit from position zero of the elements.
   static Handle<Object> PrepareSlowElementsForSort(Handle<JSObject> object,
                                                    uint32_t limit);
-  MUST_USE_RESULT MaybeObject* PrepareSlowElementsForSort(uint32_t limit);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithCallback(
       Handle<JSObject> object,
@@ -10272,9 +10272,6 @@ class JSArray: public JSObject {
                                            uint32_t index,
                                            Handle<Object> value);
 
-  MUST_USE_RESULT MaybeObject* JSArrayUpdateLengthFromIndex(uint32_t index,
-                                                            Object* value);
-
   // Initialize the array with the given capacity. The function may
   // fail due to out-of-memory situations, but only if the requested
   // capacity is non-zero.