Hide RegExp and String initialization in a closure.

src/third_party/fdlibm/fdlibm.js

Index: src/third_party/fdlibm/fdlibm.js
diff --git a/src/third_party/fdlibm/fdlibm.js b/src/third_party/fdlibm/fdlibm.js
index 360712a9d3ea1e5a798877752c6cb874a8b54af0..e0373922c3674e6a7029f593b56112b03b3013c5 100644
--- a/src/third_party/fdlibm/fdlibm.js
+++ b/src/third_party/fdlibm/fdlibm.js
@@ -30,6 +30,13 @@ var rempio2result;
   
 "use strict";
 
+%CheckIsBootstrapping();
+
+var GlobalMath = global.Math;
+var GlobalArray = global.Array;
+
+//-------------------------------------------------------------------
+
 const INVPIO2 = kMath[0];
 const PIO2_1  = kMath[1];
 const PIO2_1T = kMath[2];
@@ -1006,9 +1013,7 @@ function MathLog2(x) {
 
 //-------------------------------------------------------------------
 
-%CheckIsBootstrapping();
-
-InstallFunctions(global.Math, DONT_ENUM, $Array(
+InstallFunctions(GlobalMath, DONT_ENUM, GlobalArray(
   "cos", MathCos,
   "sin", MathSin,
   "tan", MathTan,
@@ -1023,4 +1028,4 @@ InstallFunctions(global.Math, DONT_ENUM, $Array(
 %SetInlineBuiltinFlag(MathSin);
 %SetInlineBuiltinFlag(MathCos);
 
-})();
+})();