[proxies] Implement Symbol/DONT_ENUM filtering for GetKeys()

src/js/v8natives.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) {
 
 %CheckIsBootstrapping();
 
 // ----------------------------------------------------------------------------
 // Imports
 
 var FLAG_harmony_tostring;
 var GlobalArray = global.Array;
 var GlobalBoolean = global.Boolean;
 var GlobalFunction = global.Function;
 var GlobalNumber = global.Number;
 var GlobalObject = global.Object;
 var InternalArray = utils.InternalArray;
 var iteratorSymbol = utils.ImportNow("iterator_symbol");
 var MakeRangeError;
 var MakeSyntaxError;
 var MakeTypeError;
 var MathAbs;
 var NaN = %GetRootNaN();
 var ObserveBeginPerformSplice;
 var ObserveEndPerformSplice;
 var ObserveEnqueueSpliceRecord;
 var ProxyDelegateCallAndConstruct;
 var ProxyDerivedHasOwnTrap;
-var ProxyDerivedKeysTrap;
 var SameValue = utils.ImportNow("SameValue");
 var StringIndexOf;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 utils.Import(function(from) {
   MakeRangeError = from.MakeRangeError;
   MakeSyntaxError = from.MakeSyntaxError;
   MakeTypeError = from.MakeTypeError;
   MathAbs = from.MathAbs;
   ObserveBeginPerformSplice = from.ObserveBeginPerformSplice;
   ObserveEndPerformSplice = from.ObserveEndPerformSplice;
   ObserveEnqueueSpliceRecord = from.ObserveEnqueueSpliceRecord;
   StringIndexOf = from.StringIndexOf;
 });
 
 utils.ImportFromExperimental(function(from) {
   FLAG_harmony_tostring = from.FLAG_harmony_tostring;
   ProxyDelegateCallAndConstruct = from.ProxyDelegateCallAndConstruct;
   ProxyDerivedHasOwnTrap = from.ProxyDerivedHasOwnTrap;
-  ProxyDerivedKeysTrap = from.ProxyDerivedKeysTrap;
 });
 
 // ----------------------------------------------------------------------------
 
 
 // ECMA 262 - 15.1.4
 function GlobalIsNaN(number) {
   number = TO_NUMBER(number);
   return NUMBER_IS_NAN(number);
 }
@@ skipping 206 matching lines @@
   var receiver = this;
   if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) {
     receiver = %GlobalProxy(ObjectLookupSetter);
   }
   return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), SETTER);
 }
 
 
 function ObjectKeys(obj) {
   obj = TO_OBJECT(obj);
-  if (%_IsJSProxy(obj)) {
-    var handler = %GetHandler(obj);
-    var names = CallTrap0(handler, "keys", ProxyDerivedKeysTrap);
-    return ToNameArray(names, "keys", false);
-  }
   return %OwnKeys(obj);
 }
 
 
 // ES5 8.10.1.
 function IsAccessorDescriptor(desc) {
   if (IS_UNDEFINED(desc)) return false;
   return desc.hasGetter() || desc.hasSetter();
 }
 
@@ skipping 1470 matching lines @@
 
 %InstallToContext([
   "global_eval_fun", GlobalEval,
   "object_value_of", ObjectValueOf,
   "object_to_string", ObjectToString,
   "object_get_own_property_descriptor", ObjectGetOwnPropertyDescriptor,
   "to_complete_property_descriptor", ToCompletePropertyDescriptor,
 ]);
 
 })