[builtins] Unify most of the remaining Math builtins.

src/js/math.js

Index: src/js/math.js
diff --git a/src/js/math.js b/src/js/math.js
index 0a1c2b9ce87bff70c2ca5e6985dfff7deae43903..346da2459641ff59f625e14dc869eb823804cf0d 100644
--- a/src/js/math.js
+++ b/src/js/math.js
@@ -38,57 +38,17 @@ function MathRandom() {
   return randomNumbers[--nextRandomIndex];
 }
 
-// ES6 draft 09-27-13, section 20.2.2.28.
-function MathSign(x) {
-  x = +x;
-  if (x > 0) return 1;
-  if (x < 0) return -1;
-  // -0, 0 or NaN.
-  return x;
-}
-
-// ES6 draft 09-27-13, section 20.2.2.5.
-function MathAsinh(x) {
-  x = TO_NUMBER(x);
-  // Idempotent for NaN, +/-0 and +/-Infinity.
-  if (x === 0 || !NUMBER_IS_FINITE(x)) return x;
-  if (x > 0) return %math_log(x + %math_sqrt(x * x + 1));
-  // This is to prevent numerical errors caused by large negative x.
-  return -%math_log(-x + %math_sqrt(x * x + 1));
-}
-
-// ES6 draft 09-27-13, section 20.2.2.3.
-function MathAcosh(x) {
-  x = TO_NUMBER(x);
-  if (x < 1) return NaN;
-  // Idempotent for NaN and +Infinity.
-  if (!NUMBER_IS_FINITE(x)) return x;
-  return %math_log(x + %math_sqrt(x + 1) * %math_sqrt(x - 1));
-}
-
-
 // -------------------------------------------------------------------
 
 %AddNamedProperty(GlobalMath, toStringTagSymbol, "Math", READ_ONLY | DONT_ENUM);
 
-// Set up math constants.
-utils.InstallConstants(GlobalMath, [
-  "PI", 3.1415926535897932,
-  "SQRT1_2", 0.7071067811865476,
-  "SQRT2", 1.4142135623730951
-]);
-
 // Set up non-enumerable functions of the Math object and
 // set their names.
 utils.InstallFunctions(GlobalMath, DONT_ENUM, [
   "random", MathRandom,
-  "sign", MathSign,
-  "asinh", MathAsinh,
-  "acosh", MathAcosh
 ]);
 
 %SetForceInlineFlag(MathRandom);
-%SetForceInlineFlag(MathSign);
 
 // -------------------------------------------------------------------
 // Exports