Change Math.random() to return 32 bits of random goodness, instead of 30 rand...

src/math.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 147 matching lines @@
 
 // ECMA 262 - 15.8.2.13
 function MathPow(x, y) {
   if (!IS_NUMBER(x)) x = ToNumber(x);
   if (!IS_NUMBER(y)) y = ToNumber(y);
   return %_MathPow(x, y);
 }
 
 // ECMA 262 - 15.8.2.14
 function MathRandom() {
-  return %_RandomPositiveSmi() / 0x40000000;
+  return %_RandomHeapNumber();
 }
 
 // ECMA 262 - 15.8.2.15
 function MathRound(x) {
   if (!IS_NUMBER(x)) x = ToNumber(x);
   return %RoundNumber(x);
 }
 
 // ECMA 262 - 15.8.2.16
 function MathSin(x) {
@@ skipping 76 matching lines @@
     "tan", MathTan,
     "atan2", MathAtan2,
     "pow", MathPow,
     "max", MathMax,
     "min", MathMin
   ));
 };
 
 
 SetupMath();