Pretenure builtin typed arrays.

test/mjsunit/builtins.js

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-// Flags: --expose-natives-as=builtins
+// Flags: --allow-natives-syntax --expose-natives-as=builtins
+
+// Verify that the builtin typed arrays have been pretenured.
+assertFalse(%InNewSpace(builtins.kMath));
+assertFalse(%InNewSpace(builtins.rempio2result));
+assertFalse(%InNewSpace(builtins.rngstate));
 
 // Checks that all function properties of the builtin object that are actually
 // constructors (recognized by having properties on their .prototype object),
 // have only unconfigurable properties on the prototype, and the methods
 // are also non-writable.
 
 var names = Object.getOwnPropertyNames(builtins);
 
 function isFunction(obj) {
   return typeof obj == "function";
@@ skipping 56 matching lines @@
 
 for (var i = 0; i < names.length; i++) {
   var name = names[i];
   var desc = Object.getOwnPropertyDescriptor(builtins, name);
   assertTrue(desc.hasOwnProperty("value"));
   var value = desc.value;
   if (isFunction(value)) {
     checkConstructor(value, name);
   }
 }