Use import/export for more functions (instead of js builtins object).

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 MathAbs;
+var NaN = %GetRootNaN();
 var ObserveBeginPerformSplice;
 var ObserveEndPerformSplice;
 var ObserveEnqueueSpliceRecord;
 var ProxyDelegateCallAndConstruct;
 var ProxyDerivedHasOwnTrap;
 var ProxyDerivedKeysTrap;
 var StringIndexOf;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 utils.Import(function(from) {
@@ skipping 43 matching lines @@
       // Truncate number.
       return string | 0;
     }
     string = TO_STRING(string);
     radix = radix | 0;
   } else {
     // The spec says ToString should be evaluated before ToInt32.
     string = TO_STRING(string);
     radix = TO_INT32(radix);
     if (!(radix == 0 || (2 <= radix && radix <= 36))) {
-      return NAN;
+      return NaN;
     }
   }
 
   if (%_HasCachedArrayIndex(string) &&
       (radix == 0 || radix == 10)) {
     return %_GetCachedArrayIndex(string);
   }
   return %StringParseInt(string, radix);
 }
 
@@ skipping 18 matching lines @@
 }
 
 
 // ----------------------------------------------------------------------------
 
 // Set up global object.
 var attributes = DONT_ENUM | DONT_DELETE | READ_ONLY;
 
 utils.InstallConstants(global, [
   // ECMA 262 - 15.1.1.1.
-  "NaN", NAN,
+  "NaN", NaN,
   // ECMA-262 - 15.1.1.2.
   "Infinity", INFINITY,
   // ECMA-262 - 15.1.1.2.
   "undefined", UNDEFINED,
 ]);
 
 // Set up non-enumerable function on the global object.
 utils.InstallFunctions(global, DONT_ENUM, [
   "isNaN", GlobalIsNaN,
   "isFinite", GlobalIsFinite,
@@ skipping 1459 matching lines @@
 // Set up the constructor property on the Number prototype object.
 %AddNamedProperty(GlobalNumber.prototype, "constructor", GlobalNumber,
                   DONT_ENUM);
 
 utils.InstallConstants(GlobalNumber, [
   // ECMA-262 section 15.7.3.1.
   "MAX_VALUE", 1.7976931348623157e+308,
   // ECMA-262 section 15.7.3.2.
   "MIN_VALUE", 5e-324,
   // ECMA-262 section 15.7.3.3.
-  "NaN", NAN,
+  "NaN", NaN,
   // ECMA-262 section 15.7.3.4.
   "NEGATIVE_INFINITY", -INFINITY,
   // ECMA-262 section 15.7.3.5.
   "POSITIVE_INFINITY", INFINITY,
 
   // --- Harmony constants (no spec refs until settled.)
 
   "MAX_SAFE_INTEGER", %_MathPow(2, 53) - 1,
   "MIN_SAFE_INTEGER", -%_MathPow(2, 53) + 1,
   "EPSILON", %_MathPow(2, -52)
@@ skipping 233 matching lines @@
 %InstallToContext([
   "global_eval_fun", GlobalEval,
   "object_value_of", ObjectValueOf,
   "object_to_string", ObjectToString,
   "object_define_own_property", DefineOwnPropertyFromAPI,
   "object_get_own_property_descriptor", ObjectGetOwnPropertyDescriptor,
   "to_complete_property_descriptor", ToCompletePropertyDescriptor,
 ]);
 
 })