Move reconfiguration into the elements accessor

src/elements.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ELEMENTS_H_
 #define V8_ELEMENTS_H_
 
 #include "src/elements-kind.h"
 #include "src/heap/heap.h"
 #include "src/isolate.h"
@@ skipping 122 matching lines @@
     return elements_accessors_[elements_kind];
   }
 
   static ElementsAccessor* ForArray(Handle<FixedArrayBase> array);
 
   static void InitializeOncePerProcess();
   static void TearDown();
 
   virtual void Set(FixedArrayBase* backing_store, uint32_t key,
                    Object* value) = 0;
+  virtual void Reconfigure(Handle<JSObject> object,
+                           Handle<FixedArrayBase> backing_store, uint32_t index,
+                           Handle<Object> value,
+                           PropertyAttributes attributes) = 0;
 
  protected:
   friend class SloppyArgumentsElementsAccessor;
   friend class LookupIterator;
 
   static ElementsAccessor* ForArray(FixedArrayBase* array);
 
   virtual uint32_t GetCapacity(JSObject* holder,
                                FixedArrayBase* backing_store) = 0;
 
@@ skipping 24 matching lines @@
 void CheckArrayAbuse(Handle<JSObject> obj, const char* op, uint32_t key,
                      bool allow_appending = false);
 
 MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements(
     Handle<JSArray> array,
     Arguments* args);
 
 } }  // namespace v8::internal
 
 #endif  // V8_ELEMENTS_H_