Remove JSBuiltinsObject.

src/third_party/fdlibm/fdlibm.js

 // The following is adapted from fdlibm (http://www.netlib.org/fdlibm),
 //
 // ====================================================
 // Copyright (C) 1993-2004 by Sun Microsystems, Inc. All rights reserved.
 //
 // Developed at SunSoft, a Sun Microsystems, Inc. business.
 // Permission to use, copy, modify, and distribute this
 // software is freely granted, provided that this notice
 // is preserved.
 // ====================================================
@@ skipping 1050 matching lines @@
                      KLOG2(3) + s2 * (KLOG2(4) + s2 * KLOG2(5))))));
   r += s_l * (s_h + ss);
   s2  = s_h * s_h;
   t_h = %_ConstructDouble(%_DoubleHi(3.0 + s2 + r), 0);
   t_l = r - ((t_h - 3.0) - s2);
   // u + v = ss * (1 + ...)
   u = s_h * t_h;
   v = s_l * t_h + t_l * ss;
 
   // 2 / (3 * log(2)) * (ss + ...)
-  p_h = %_ConstructDouble(%_DoubleHi(u + v), 0);
-  p_l = v - (p_h - u);
-  z_h = CP_H * p_h;
-  z_l = CP_L * p_h + p_l * CP + dp_l;
+  var p_h = %_ConstructDouble(%_DoubleHi(u + v), 0);
+  var p_l = v - (p_h - u);
+  var z_h = CP_H * p_h;
+  var z_l = CP_L * p_h + p_l * CP + dp_l;
 
   // log2(ax) = (ss + ...) * 2 / (3 * log(2)) = n + dp_h + z_h + z_l
   var t = n;
   var t1 = %_ConstructDouble(%_DoubleHi(((z_h + z_l) + dp_h) + t), 0);
   var t2 = z_l - (((t1 - t) - dp_h) - z_h);
 
   // t1 + t2 = log2(ax), sum up because we do not care about extra precision.
   return t1 + t2;
 }
 
 //-------------------------------------------------------------------
 
 utils.InstallFunctions(GlobalMath, DONT_ENUM, [
   "cos", MathCos,
   "sin", MathSin,
   "tan", MathTan,
   "sinh", MathSinh,
   "cosh", MathCosh,
   "tanh", MathTanh,
   "log10", MathLog10,
   "log2", MathLog2,
   "log1p", MathLog1p,
   "expm1", MathExpm1
 ]);
 
 %SetForceInlineFlag(MathSin);
 %SetForceInlineFlag(MathCos);
 
 })