[ESnext] Implement Object spread

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 959dc0fa0a9a8dc5b1c59977823c254044d6d963..ed006f749de8a1378cc51e3363d967e1442c1710 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -3439,6 +3439,7 @@ EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_async_await)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_restrictive_generators)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_trailing_commas)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_class_fields)
+EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_object_spread)
 
 void InstallPublicSymbol(Factory* factory, Handle<Context> native_context,
                          const char* name, Handle<Symbol> value) {
@@ -4000,6 +4001,7 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_restrictive_generators_natives[] = {nullptr};
   static const char* harmony_trailing_commas_natives[] = {nullptr};
   static const char* harmony_class_fields_natives[] = {nullptr};
+  static const char* harmony_object_spread_natives[] = {nullptr};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount(); i++) {