Revert of Disable non-standard Promise functions in staging

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 820ba618108af0160feb511e95fc5db0d662ad9f..3db75a4dc048af5118017137ca510dbfdfdbe3ca 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -206,7 +206,6 @@
   HARMONY_INPROGRESS(DECLARE_FEATURE_INITIALIZATION)
   HARMONY_STAGED(DECLARE_FEATURE_INITIALIZATION)
   HARMONY_SHIPPING(DECLARE_FEATURE_INITIALIZATION)
-  DECLARE_FEATURE_INITIALIZATION(promise_extra, "")
 #undef DECLARE_FEATURE_INITIALIZATION
 
   Handle<JSFunction> InstallInternalArray(Handle<JSObject> target,
@@ -1525,7 +1524,6 @@
   HARMONY_INPROGRESS(FEATURE_INITIALIZE_GLOBAL)
   HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL)
   HARMONY_SHIPPING(FEATURE_INITIALIZE_GLOBAL)
-  FEATURE_INITIALIZE_GLOBAL(promise_extra, "")
 #undef FEATURE_INITIALIZE_GLOBAL
 }
 
@@ -2065,7 +2063,6 @@
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_tolength)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_do_expressions)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_regexp_lookbehind)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(promise_extra)
 
 
 static void SimpleInstallFunction(Handle<JSObject>& base, const char* name,
@@ -2599,8 +2596,6 @@
   static const char* harmony_do_expressions_natives[] = {nullptr};
   static const char* harmony_regexp_subclass_natives[] = {nullptr};
   static const char* harmony_regexp_lookbehind_natives[] = {nullptr};
-  static const char* promise_extra_natives[] = {"native promise-extra.js",
-                                                nullptr};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount(); i++) {
@@ -2619,7 +2614,6 @@
     HARMONY_INPROGRESS(INSTALL_EXPERIMENTAL_NATIVES);
     HARMONY_STAGED(INSTALL_EXPERIMENTAL_NATIVES);
     HARMONY_SHIPPING(INSTALL_EXPERIMENTAL_NATIVES);
-    INSTALL_EXPERIMENTAL_NATIVES(promise_extra, "");
 #undef INSTALL_EXPERIMENTAL_NATIVES
   }