Revert of [typedarrays] move %TypedArray%.prototype.copyWithin to C++

src/js/array.js

Index: src/js/array.js
diff --git a/src/js/array.js b/src/js/array.js
index 2cb2eda9552584a77f02f3f80ce128a4377d78c7..e80aa8df23757e0fb1bd19463258c07a57a4fb92 100644
--- a/src/js/array.js
+++ b/src/js/array.js
@@ -1270,13 +1270,7 @@ function ArrayReduceRight(callback, current) {
 }
 
 
-// ES6 draft 03-17-15, section 22.1.3.3
-function ArrayCopyWithin(target, start, end) {
-  CHECK_OBJECT_COERCIBLE(this, "Array.prototype.copyWithin");
-
-  var array = TO_OBJECT(this);
-  var length = TO_LENGTH(array.length);
-
+function InnerArrayCopyWithin(target, start, end, array, length) {
   target = TO_INTEGER(target);
   var to;
   if (target < 0) {
@@ -1324,6 +1318,17 @@ function ArrayCopyWithin(target, start, end) {
 }
 
 
+// ES6 draft 03-17-15, section 22.1.3.3
+function ArrayCopyWithin(target, start, end) {
+  CHECK_OBJECT_COERCIBLE(this, "Array.prototype.copyWithin");
+
+  var array = TO_OBJECT(this);
+  var length = TO_LENGTH(array.length);
+
+  return InnerArrayCopyWithin(target, start, end, array, length);
+}
+
+
 function InnerArrayFind(predicate, thisArg, array, length) {
   if (!IS_CALLABLE(predicate)) {
     throw %make_type_error(kCalledNonCallable, predicate);
@@ -1620,6 +1625,7 @@ utils.Export(function(to) {
   to.ArrayPush = ArrayPush;
   to.ArrayToString = ArrayToString;
   to.ArrayValues = IteratorFunctions.values,
+  to.InnerArrayCopyWithin = InnerArrayCopyWithin;
   to.InnerArrayEvery = InnerArrayEvery;
   to.InnerArrayFill = InnerArrayFill;
   to.InnerArrayFilter = InnerArrayFilter;