Native context: do not put public symbols and flags on the js builtins object.

src/array-iterator.js

 // Copyright 2013 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.
 
 var $arrayValues;
 
 (function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -----------------------------------------------------------------------
 // Imports
 
 var arrayIterationKindSymbol =
-    utils.GetPrivateSymbol("array_iteration_kind_symbol");
+    utils.ImportNow("array_iteration_kind_symbol");
 var arrayIteratorNextIndexSymbol =
-    utils.GetPrivateSymbol("array_iterator_next_symbol");
+    utils.ImportNow("array_iterator_next_symbol");
 var arrayIteratorObjectSymbol =
-    utils.GetPrivateSymbol("array_iterator_object_symbol");
+    utils.ImportNow("array_iterator_object_symbol");
 var GlobalArray = global.Array;
+var iteratorSymbol = utils.ImportNow("iterator_symbol");
+var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 macro TYPED_ARRAYS(FUNCTION)
   FUNCTION(Uint8Array)
   FUNCTION(Int8Array)
   FUNCTION(Uint16Array)
   FUNCTION(Int16Array)
   FUNCTION(Uint32Array)
   FUNCTION(Int32Array)
   FUNCTION(Float32Array)
   FUNCTION(Float64Array)
@@ skipping 92 matching lines @@
   return CreateArrayIterator(this, ITERATOR_KIND_KEYS);
 }
 
 
 %FunctionSetPrototype(ArrayIterator, {__proto__: $iteratorPrototype});
 %FunctionSetInstanceClassName(ArrayIterator, 'Array Iterator');
 
 utils.InstallFunctions(ArrayIterator.prototype, DONT_ENUM, [
   'next', ArrayIteratorNext
 ]);
-utils.SetFunctionName(ArrayIteratorIterator, symbolIterator);
-%AddNamedProperty(ArrayIterator.prototype, symbolIterator,
+utils.SetFunctionName(ArrayIteratorIterator, iteratorSymbol);
+%AddNamedProperty(ArrayIterator.prototype, iteratorSymbol,
                   ArrayIteratorIterator, DONT_ENUM);
-%AddNamedProperty(ArrayIterator.prototype, symbolToStringTag,
+%AddNamedProperty(ArrayIterator.prototype, toStringTagSymbol,
                   "Array Iterator", READ_ONLY | DONT_ENUM);
 
 utils.InstallFunctions(GlobalArray.prototype, DONT_ENUM, [
   // No 'values' since it breaks webcompat: http://crbug.com/409858
   'entries', ArrayEntries,
   'keys', ArrayKeys
 ]);
 
 // TODO(adam): Remove this call once 'values' is in the above
 // InstallFunctions block, as it'll be redundant.
 utils.SetFunctionName(ArrayValues, 'values');
 
-%AddNamedProperty(GlobalArray.prototype, symbolIterator, ArrayValues,
+%AddNamedProperty(GlobalArray.prototype, iteratorSymbol, ArrayValues,
                   DONT_ENUM);
 
 macro EXTEND_TYPED_ARRAY(NAME)
   %AddNamedProperty(GlobalNAME.prototype, 'entries', ArrayEntries, DONT_ENUM);
   %AddNamedProperty(GlobalNAME.prototype, 'values', ArrayValues, DONT_ENUM);
   %AddNamedProperty(GlobalNAME.prototype, 'keys', ArrayKeys, DONT_ENUM);
-  %AddNamedProperty(GlobalNAME.prototype, symbolIterator, ArrayValues,
+  %AddNamedProperty(GlobalNAME.prototype, iteratorSymbol, ArrayValues,
                     DONT_ENUM);
 endmacro
 
 TYPED_ARRAYS(EXTEND_TYPED_ARRAY)
 
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.ArrayIteratorCreateResultObject = CreateIteratorResultObject;
 });
 
 $arrayValues = ArrayValues;
 
 %InstallToContext(["array_values_iterator", ArrayValues]);
 
 })