[builtins] implement JSBuiltinReducer for ArrayIteratorNext()

src/compiler/js-builtin-reducer.h

Index: src/compiler/js-builtin-reducer.h
diff --git a/src/compiler/js-builtin-reducer.h b/src/compiler/js-builtin-reducer.h
index 76165f0c03da11f9b906ee7644d6185be210761a..93c60e1c64bb698bda08977fff45db238d746257 100644
--- a/src/compiler/js-builtin-reducer.h
+++ b/src/compiler/js-builtin-reducer.h
@@ -45,6 +45,12 @@ class V8_EXPORT_PRIVATE JSBuiltinReducer final
   Reduction Reduce(Node* node) final;
 
  private:
+  Reduction ReduceArrayIterator(Node* node, IterationKind kind);
+  Reduction ReduceArrayIteratorNext(Node* node);
+  Reduction ReduceFastArrayIteratorNext(Handle<Map> iterator_map, Node* node,
+                                        IterationKind kind);
+  Reduction ReduceTypedArrayIteratorNext(Handle<Map> iterator_map, Node* node,
+                                         IterationKind kind);
   Reduction ReduceArrayPop(Node* node);
   Reduction ReduceArrayPush(Node* node);
   Reduction ReduceDateGetTime(Node* node);