[math] Fix Math.hypot to properly call ToNumber on all arguments.

src/js/math.js

Index: src/js/math.js
diff --git a/src/js/math.js b/src/js/math.js
index 8a84fdfd69f7ad32cfeaa0f1fb7a758b567fd09d..a698fd4285cac1adbc1396f84deab9ab6d29e97c 100644
--- a/src/js/math.js
+++ b/src/js/math.js
@@ -164,17 +164,14 @@ function MathHypot(x, y) {  // Function length is 2.
   // We may want to introduce fast paths for two arguments and when
   // normalization to avoid overflow is not necessary.  For now, we
   // simply assume the general case.
-  var length = %_ArgumentsLength();
-  var args = new InternalArray(length);
+  var length = arguments.length;
   var max = 0;
   for (var i = 0; i < length; i++) {
-    var n = %_Arguments(i);
-    n = TO_NUMBER(n);
-    if (n === INFINITY || n === -INFINITY) return INFINITY;
-    n = MathAbs(n);
+    var n = MathAbs(arguments[i]);
     if (n > max) max = n;
-    args[i] = n;
+    arguments[i] = n;
   }
+  if (max === INFINITY) return INFINITY;
 
   // Kahan summation to avoid rounding errors.
   // Normalize the numbers to the largest one to avoid overflow.
@@ -182,7 +179,7 @@ function MathHypot(x, y) {  // Function length is 2.
   var sum = 0;
   var compensation = 0;
   for (var i = 0; i < length; i++) {
-    var n = args[i] / max;
+    var n = arguments[i] / max;
     var summand = n * n - compensation;
     var preliminary = sum + summand;
     compensation = (preliminary - sum) - summand;