Clean up native context slots and add new ones.

src/math.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.
 
 var rngstate;  // Initialized to a Uint32Array during genesis.
 
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
+var GlobalMath = global.Math;
 var GlobalObject = global.Object;
 var InternalArray = utils.InternalArray;
 
 //-------------------------------------------------------------------
 
 // ECMA 262 - 15.8.2.1
 function MathAbs(x) {
   x = +x;
   return (x > 0) ? x : 0 - x;
 }
@@ skipping 255 matching lines @@
   var approx_hi = MathFloorJS(%_DoubleHi(x) / 3) + 0x2A9F7893;
   var approx = %_ConstructDouble(approx_hi, 0);
   approx = NEWTON_ITERATION_CBRT(x, approx);
   approx = NEWTON_ITERATION_CBRT(x, approx);
   approx = NEWTON_ITERATION_CBRT(x, approx);
   return NEWTON_ITERATION_CBRT(x, approx);
 }
 
 // -------------------------------------------------------------------
 
-// Instance class name can only be set on functions. That is the only
-// purpose for MathConstructor.
-function MathConstructor() {}
-
-var Math = new MathConstructor();
-
-%InternalSetPrototype(Math, GlobalObject.prototype);
-%AddNamedProperty(global, "Math", Math, DONT_ENUM);
-%FunctionSetInstanceClassName(MathConstructor, 'Math');
-
-%AddNamedProperty(Math, symbolToStringTag, "Math", READ_ONLY | DONT_ENUM);
+%AddNamedProperty(GlobalMath, symbolToStringTag, "Math", READ_ONLY | DONT_ENUM);
 
 // Set up math constants.
-utils.InstallConstants(Math, [
+utils.InstallConstants(GlobalMath, [
   // ECMA-262, section 15.8.1.1.
   "E", 2.7182818284590452354,
   // ECMA-262, section 15.8.1.2.
   "LN10", 2.302585092994046,
   // ECMA-262, section 15.8.1.3.
   "LN2", 0.6931471805599453,
   // ECMA-262, section 15.8.1.4.
   "LOG2E", 1.4426950408889634,
   "LOG10E", 0.4342944819032518,
   "PI", 3.1415926535897932,
   "SQRT1_2", 0.7071067811865476,
   "SQRT2", 1.4142135623730951
 ]);
 
 // Set up non-enumerable functions of the Math object and
 // set their names.
-utils.InstallFunctions(Math, DONT_ENUM, [
+utils.InstallFunctions(GlobalMath, DONT_ENUM, [
   "random", MathRandom,
   "abs", MathAbs,
   "acos", MathAcosJS,
   "asin", MathAsinJS,
   "atan", MathAtanJS,
   "ceil", MathCeil,
   "exp", MathExp,
   "floor", MathFloorJS,
   "log", MathLog,
   "round", MathRound,
@@ skipping 34 matching lines @@
 utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.MathExp = MathExp;
   to.MathFloor = MathFloorJS;
   to.IntRandom = MathRandomRaw;
   to.MathMax = MathMax;
   to.MathMin = MathMin;
 });
 
 })