Provide an RNG seed for creating snapshot.

src/js/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.
 
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var GlobalMath = global.Math;
 var GlobalObject = global.Object;
 var InternalArray = utils.InternalArray;
 var NaN = %GetRootNaN();
-var rngstate;
+var rngstate = { a: 1, b: 2, c: 3, d: 4 };
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 utils.InitializeRNG = function() {
   var state = %InitializeRNG();
   rngstate = { a: state[0], b: state[1], c: state[2], d: state[3] };
 };
 
 //-------------------------------------------------------------------
 
 // ECMA 262 - 15.8.2.1
@@ skipping 325 matching lines @@
 utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.MathExp = MathExp;
   to.MathFloor = MathFloorJS;
   to.IntRandom = MathRandomRaw;
   to.MathMax = MathMax;
   to.MathMin = MathMin;
 });
 
 })