Teach C++ ArraySlice builtin to deal with arguments object.

test/mjsunit/array-slice.js

 // Copyright 2010 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
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@@ skipping 200 matching lines @@
     // ... but keeps the rest as holes:
     Array.prototype[5] = "@5";
     assertEquals(array[5], Array.prototype[5]);
     assertFalse(array.hasOwnProperty(5));
     assertEquals(sliced[5], Array.prototype[5]);
     assertFalse(sliced.hasOwnProperty(5));
 
     assertTrue(delete Array.prototype[5]);
   }
 })();
+
+// Check slicing on arguments object.
+(function() {
+  function func(expected, a0, a1, a2) {
+    assertEquals(expected, Array.prototype.slice.call(arguments, 1));
+  }
+
+  func([]);
+  func(['a'], 'a');
+  func(['a', 1], 'a', 1);
+  func(['a', 1, undefined], 'a', 1, undefined);
+  func(['a', 1, undefined, void(0)], 'a', 1, undefined, void(0));
+})();