Revert of Protect the emptiness of Array prototype elements with a PropertyCell.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 1c4996cb5fbd1d324d9e97f9aa8fa760ae6d9c2f..95db6d786f6be45e8be742a4c431a09ee3e015e2 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5742,6 +5742,9 @@
     // described by this map changes shape (and transitions to a new map),
     // possibly invalidating the assumptions embedded in the code.
     kPrototypeCheckGroup,
+    // Group of code that depends on elements not being added to objects with
+    // this map.
+    kElementsCantBeAddedGroup,
     // Group of code that depends on global property values in property cells
     // not being changed.
     kPropertyCellChangedGroup,
@@ -9826,9 +9829,6 @@
   static Handle<PropertyCell> InvalidateEntry(Handle<NameDictionary> dictionary,
                                               int entry);
 
-  static void SetValueWithInvalidation(Handle<PropertyCell> cell,
-                                       Handle<Object> new_value);
-
   DECLARE_CAST(PropertyCell)
 
   // Dispatched behavior.