Fixes javascript integer overflow check.

tests/standalone/53bit_overflow_literal_test.dart

Index: tests/standalone/53bit_overflow_literal_test.dart
===================================================================
--- tests/standalone/53bit_overflow_literal_test.dart	(revision 25633)
+++ tests/standalone/53bit_overflow_literal_test.dart	(working copy)
@@ -1,18 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// VMOptions=--throw_on_javascript_int_overflow
-
-
-import "package:expect/expect.dart";
-
-int literals() {
-  var okay_literal = 0xFFFFFFFFFFFFF;
-  var too_big_literal = 0x1FFFFFFFFFFFFF;  /// 01: compile-time error
-  return okay_literal;
-}
-
-main() {
-  Expect.equals(0xFFFFFFFFFFFFF, literals());
-}