Fix bogus call to Object.hasOwnProperty in Array builtin.

R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-builtinbust-5

Review URL: https://codereview.chromium.org/239033002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20766 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/array.js

@@ -651,17 +651,6 @@ function ArrayUnshift(arg1) {  // length == 1
   if (IS_ARRAY(this) && !is_sealed) {
     SmartMove(this, 0, 0, len, num_arguments);
   } else {
-    if (num_arguments == 0 && ObjectIsFrozen(this)) {
-      // In the zero argument case, values from the prototype come into the
-      // object. This can't be allowed on frozen arrays.
-      for (var i = 0; i < len; i++) {
-        if (!this.hasOwnProperty(i) && !IS_UNDEFINED(this[i])) {
-          throw MakeTypeError("array_functions_on_frozen",
-                              ["Array.prototype.shift"]);
-        }
-      }
-    }
-
     SimpleMove(this, 0, 0, len, num_arguments);
   }
 

test/mjsunit/regress/regress-builtinbust-5.js

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var a = [ 1, 2, 3 ];
+var was_called = false;
+function poison() { was_called = true; }
+a.hasOwnProperty = poison;
+Object.freeze(a);
+
+assertThrows("a.unshift()", TypeError);
+assertEquals(3, a.length);
+assertFalse(was_called);