Wrap harmony implementations in functions.

src/ast-value-factory.h

Index: src/ast-value-factory.h
diff --git a/src/ast-value-factory.h b/src/ast-value-factory.h
index 6570db26ffa88cb4f3fc50cd5ec34870830cd6b0..3252bfde7d8a1cc5e3b235c79de6bee18f098157 100644
--- a/src/ast-value-factory.h
+++ b/src/ast-value-factory.h
@@ -258,10 +258,10 @@ class AstValue : public ZoneObject {
   F(next, "next")                                                          \
   F(proto, "__proto__")                                                    \
   F(prototype, "prototype")                                                \
-  F(reflect_apply, "ReflectApply")                                         \
-  F(reflect_construct, "ReflectConstruct")                                 \
-  F(spread_arguments, "SpreadArguments")                                   \
-  F(spread_iterable, "SpreadIterable")                                     \
+  F(reflect_apply, "$reflectApply")                                        \
+  F(reflect_construct, "$reflectConstruct")                                \
+  F(spread_arguments, "$spreadArguments")                                  \
+  F(spread_iterable, "$spreadIterable")                                    \
   F(this, "this")                                                          \
   F(throw_iterator_result_not_an_object, "ThrowIteratorResultNotAnObject") \
   F(to_string, "ToString")                                                 \