Remove all harmony runtime flags which shipped in M51

src/js/array.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, extrasUtils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
-var FLAG_harmony_species;
 var GetIterator;
 var GetMethod;
 var GlobalArray = global.Array;
 var InternalArray = utils.InternalArray;
 var InternalPackedArray = utils.InternalPackedArray;
 var MakeTypeError;
 var MaxSimple;
 var MinSimple;
 var ObjectHasOwnProperty;
 var ObjectToString = utils.ImportNow("object_to_string");
 var iteratorSymbol = utils.ImportNow("iterator_symbol");
+var speciesSymbol = utils.ImportNow("species_symbol");
 var unscopablesSymbol = utils.ImportNow("unscopables_symbol");
 
 utils.Import(function(from) {
   GetIterator = from.GetIterator;
   GetMethod = from.GetMethod;
   MakeTypeError = from.MakeTypeError;
   MaxSimple = from.MaxSimple;
   MinSimple = from.MinSimple;
   ObjectHasOwnProperty = from.ObjectHasOwnProperty;
 });
 
-utils.ImportFromExperimental(function(from) {
-  FLAG_harmony_species = from.FLAG_harmony_species;
-});
-
 // -------------------------------------------------------------------
 
 
 function ArraySpeciesCreate(array, length) {
-  var constructor;
-
   length = INVERT_NEG_ZERO(length);
-
-  if (FLAG_harmony_species) {
-    constructor = %ArraySpeciesConstructor(array);
-  } else {
-    constructor = GlobalArray;
-  }
+  var constructor = %ArraySpeciesConstructor(array);
   return new constructor(length);
 }
 
 
 function KeySortCompare(a, b) {
   return a - b;
 }
 
 function GetSortedArrayKeys(array, indices) {
   if (IS_NUMBER(indices)) {
@@ skipping 1571 matching lines @@
   var constructor = this;
   // TODO: Implement IsConstructor (ES6 section 7.2.5)
   var array = %IsConstructor(constructor) ? new constructor(length) : [];
   for (var i = 0; i < length; i++) {
     %CreateDataProperty(array, i, args[i]);
   }
   array.length = length;
   return array;
 }
 
+
+function ArraySpecies() {
+  return this;
+}
+
+
 // -------------------------------------------------------------------
 
 // Set up non-enumerable constructor property on the Array.prototype
 // object.
 %AddNamedProperty(GlobalArray.prototype, "constructor", GlobalArray,
                   DONT_ENUM);
 
 // Set up unscopable properties on the Array.prototype object.
 var unscopables = {
   __proto__: null,
@@ skipping 55 matching lines @@
   "lastIndexOf", getFunction("lastIndexOf", ArrayLastIndexOf, 1),
   "reduce", getFunction("reduce", ArrayReduce, 1),
   "reduceRight", getFunction("reduceRight", ArrayReduceRight, 1),
   "copyWithin", getFunction("copyWithin", ArrayCopyWithin, 2),
   "find", getFunction("find", ArrayFind, 1),
   "findIndex", getFunction("findIndex", ArrayFindIndex, 1),
   "fill", getFunction("fill", ArrayFill, 1),
   "includes", getFunction("includes", ArrayIncludes, 1),
 ]);
 
+utils.InstallGetter(GlobalArray, speciesSymbol, ArraySpecies);
+
 %FinishArrayPrototypeSetup(GlobalArray.prototype);
 
 // The internal Array prototype doesn't need to be fancy, since it's never
 // exposed to user code.
 // Adding only the functions that are actually used.
 utils.SetUpLockedPrototype(InternalArray, GlobalArray(), [
   "indexOf", getFunction("indexOf", ArrayIndexOf),
   "join", getFunction("join", ArrayJoin),
   "pop", getFunction("pop", ArrayPop),
   "push", getFunction("push", ArrayPush),
@@ skipping 51 matching lines @@
 %InstallToContext([
   "array_pop", ArrayPop,
   "array_push", ArrayPush,
   "array_shift", ArrayShift,
   "array_splice", ArraySplice,
   "array_slice", ArraySlice,
   "array_unshift", ArrayUnshift,
 ]);
 
 });