Remove all harmony runtime flags which shipped in M51

src/js/collection.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var GlobalMap = global.Map;
 var GlobalObject = global.Object;
 var GlobalSet = global.Set;
 var hashCodeSymbol = utils.ImportNow("hash_code_symbol");
 var IntRandom;
 var MakeTypeError;
 var MapIterator;
 var NumberIsNaN;
 var SetIterator;
+var speciesSymbol = utils.ImportNow("species_symbol");
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 utils.Import(function(from) {
   IntRandom = from.IntRandom;
   MakeTypeError = from.MakeTypeError;
   MapIterator = from.MapIterator;
   NumberIsNaN = from.NumberIsNaN;
   SetIterator = from.SetIterator;
 });
 
@@ skipping 216 matching lines @@
 
   var iterator = new SetIterator(this, ITERATOR_KIND_VALUES);
   var key;
   var value_array = [UNDEFINED];
   while (%SetIteratorNext(iterator, value_array)) {
     key = value_array[0];
     %_Call(f, receiver, key, key, this);
   }
 }
 
+
+function SetSpecies() {
+  return this;
+}
+
+
 // -------------------------------------------------------------------
 
 %SetCode(GlobalSet, SetConstructor);
 %FunctionSetLength(GlobalSet, 0);
 %FunctionSetPrototype(GlobalSet, new GlobalObject());
 %AddNamedProperty(GlobalSet.prototype, "constructor", GlobalSet, DONT_ENUM);
 %AddNamedProperty(GlobalSet.prototype, toStringTagSymbol, "Set",
                   DONT_ENUM | READ_ONLY);
 
 %FunctionSetLength(SetForEach, 1);
 
+utils.InstallGetter(GlobalSet, speciesSymbol, SetSpecies);
+
 // Set up the non-enumerable functions on the Set prototype object.
 utils.InstallGetter(GlobalSet.prototype, "size", SetGetSize);
 utils.InstallFunctions(GlobalSet.prototype, DONT_ENUM, [
   "add", SetAdd,
   "has", SetHas,
   "delete", SetDelete,
   "clear", SetClearJS,
   "forEach", SetForEach
 ]);
 
@@ skipping 149 matching lines @@
 
   if (!IS_CALLABLE(f)) throw MakeTypeError(kCalledNonCallable, f);
 
   var iterator = new MapIterator(this, ITERATOR_KIND_ENTRIES);
   var value_array = [UNDEFINED, UNDEFINED];
   while (%MapIteratorNext(iterator, value_array)) {
     %_Call(f, receiver, value_array[1], value_array[0], this);
   }
 }
 
+
+function MapSpecies() {
+  return this;
+}
+
 // -------------------------------------------------------------------
 
 %SetCode(GlobalMap, MapConstructor);
 %FunctionSetLength(GlobalMap, 0);
 %FunctionSetPrototype(GlobalMap, new GlobalObject());
 %AddNamedProperty(GlobalMap.prototype, "constructor", GlobalMap, DONT_ENUM);
 %AddNamedProperty(
     GlobalMap.prototype, toStringTagSymbol, "Map", DONT_ENUM | READ_ONLY);
 
 %FunctionSetLength(MapForEach, 1);
 
+utils.InstallGetter(GlobalMap, speciesSymbol, MapSpecies);
+
 // Set up the non-enumerable functions on the Map prototype object.
 utils.InstallGetter(GlobalMap.prototype, "size", MapGetSize);
 utils.InstallFunctions(GlobalMap.prototype, DONT_ENUM, [
   "get", MapGet,
   "set", MapSet,
   "has", MapHas,
   "delete", MapDelete,
   "clear", MapClearJS,
   "forEach", MapForEach
 ]);
@@ skipping 10 matching lines @@
   "set_has", SetHas,
   "set_delete", SetDelete,
 ]);
 
 utils.Export(function(to) {
   to.GetExistingHash = GetExistingHash;
   to.GetHash = GetHash;
 });
 
 })