Adding ElementsAccessor::Splice

src/elements.h

Index: src/elements.h
diff --git a/src/elements.h b/src/elements.h
index 0131f0baf00c6bee8f1dbc94b2e219c31d568190..16be8ecde3564941735e5e093ad920ec4d9e856e 100644
--- a/src/elements.h
+++ b/src/elements.h
@@ -131,6 +131,11 @@ class ElementsAccessor {
                         Handle<FixedArrayBase> backing_store, Object** objects,
                         uint32_t start, int direction) = 0;
 
+  virtual Handle<JSArray> Splice(Handle<JSArray> receiver,
+                                 Handle<FixedArrayBase> backing_store,
+                                 uint32_t start, uint32_t delete_count,
+                                 Arguments args, uint32_t add_count) = 0;
+
  protected:
   friend class LookupIterator;