[es6] implement destructuring assignment

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index db9146ac9d5b50c947a16aacf1f40f009a87916b..26857502da6705d59e88a1d81fb8b7e74e3f8686 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1978,6 +1978,7 @@ EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy_let)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_rest_parameters)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_default_parameters)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_destructuring_bind)
+EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_destructuring_assignment)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_object_observe)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_regexps)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_unicode_regexps)
@@ -2469,6 +2470,7 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_reflect_natives[] = {"native harmony-reflect.js",
                                                   nullptr};
   static const char* harmony_destructuring_bind_natives[] = {nullptr};
+  static const char* harmony_destructuring_assignment_natives[] = {nullptr};
   static const char* harmony_object_observe_natives[] = {
       "native harmony-object-observe.js", nullptr};
   static const char* harmony_sharedarraybuffer_natives[] = {