Hide Math function implementations in a closure.

src/arraybuffer.js

Index: src/arraybuffer.js
diff --git a/src/arraybuffer.js b/src/arraybuffer.js
index cf00693be7ff4e9b240c90460169515e8d7b16b2..cbb51433bb68e7781aa98443019f88d64f8d9c49 100644
--- a/src/arraybuffer.js
+++ b/src/arraybuffer.js
@@ -39,16 +39,16 @@ function ArrayBufferSlice(start, end) {
   var first;
   var byte_length = %_ArrayBufferGetByteLength(this);
   if (relativeStart < 0) {
-    first = MathMax(byte_length + relativeStart, 0);
+    first = $max(byte_length + relativeStart, 0);
   } else {
-    first = MathMin(relativeStart, byte_length);
+    first = $min(relativeStart, byte_length);
   }
   var relativeEnd = IS_UNDEFINED(end) ? byte_length : end;
   var fin;
   if (relativeEnd < 0) {
-    fin = MathMax(byte_length + relativeEnd, 0);
+    fin = $max(byte_length + relativeEnd, 0);
   } else {
-    fin = MathMin(relativeEnd, byte_length);
+    fin = $min(relativeEnd, byte_length);
   }
 
   if (fin < first) {