[builtins] Drop the special MathRandomRaw.

This is the last user of %_DoubleLo and actually unnecessary, since we
can just use the normal Math.random() instead.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2109483004
Cr-Commit-Position: refs/heads/master@{#37359}

src/js/collection.js

@@ -14,7 +14,7 @@ var GlobalMap = global.Map;
 var GlobalObject = global.Object;
 var GlobalSet = global.Set;
 var hashCodeSymbol = utils.ImportNow("hash_code_symbol");
-var IntRandom;
+var MathRandom;
 var MakeTypeError;
 var MapIterator;
 var NumberIsNaN;
@@ -23,7 +23,7 @@ var speciesSymbol = utils.ImportNow("species_symbol");
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 utils.Import(function(from) {
-  IntRandom = from.IntRandom;
+  MathRandom = from.MathRandom;
   MakeTypeError = from.MakeTypeError;
   MapIterator = from.MapIterator;
   NumberIsNaN = from.NumberIsNaN;
@@ -113,7 +113,7 @@ function GetExistingHash(key) {
 function GetHash(key) {
   var hash = GetExistingHash(key);
   if (IS_UNDEFINED(hash)) {
-    hash = IntRandom() | 0;
+    hash = (MathRandom() * 0x40000000) | 0;
     if (hash === 0) hash = 1;
     SET_PRIVATE(key, hashCodeSymbol, hash);
   }

src/js/math.js

@@ -47,14 +47,6 @@ function MathRandom() {
   return randomNumbers[--nextRandomIndex];
 }
 
-function MathRandomRaw() {
-  if (nextRandomIndex <= kRandomNumberStart) {
-    randomNumbers = %GenerateRandomNumbers(randomNumbers);
-    nextRandomIndex = %_TypedArrayGetLength(randomNumbers);
-  }
-  return %_DoubleLo(randomNumbers[--nextRandomIndex]) & 0x3FFFFFFF;
-}
-
 // ES6 draft 09-27-13, section 20.2.2.28.
 function MathSign(x) {
   x = +x;
@@ -142,7 +134,7 @@ utils.InstallFunctions(GlobalMath, DONT_ENUM, [
 
 utils.Export(function(to) {
   to.MathAbs = MathAbs;
-  to.IntRandom = MathRandomRaw;
+  to.MathRandom = MathRandom;
 });
 
 })