Always invoke the default Array.sort functions from builtin functions.

test/mjsunit/regress/regress-builtin-array-op.js

+// Copyright 2012 the V8 project authors. All rights reserved.
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+// modification, are permitted provided that the following conditions are
+// met:
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+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test that we invoke the correct sort function in
+// array operations.
+
+var foo =  "hest";
+Array.prototype.sort = function(fn) { foo = "fisk"; }
+var a = [2,3,1];
+a[100000] = 0;
+a.join();
+assertEquals("hest", foo);
+