Fix bot redness.

tests/compiler/dart2js/value_range_test.dart

 // Copyright (c) 2012, 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.
 
 import "package:expect/expect.dart";
 import 'compiler_helper.dart';
 
 const int REMOVED = 0;
 const int ABOVE_ZERO = 1;
 const int BELOW_LENGTH = 2;
@@ skipping 191 matching lines @@
 // TODO(ahe): It would probably be better if this test used the real
 // core library sources, as its purpose is to detect failure to
 // optimize fixed-sized arrays.
 const String DEFAULT_CORELIB_WITH_LIST_INTERFACE = r'''
   print(var obj) {}
   abstract class num {}
   abstract class int extends num { }
   abstract class double extends num { }
   class bool {}
   class String {}
-  class Object {}
+  class Object {
+    Object();
+  }
   class Type {}
   class Function {}
   class List {
     List([int length]);
   }
   abstract class Map {}
   class Closure {}
   class Null {}
   class Dynamic_ {}
   class StackTrace {}
@@ skipping 90 matching lines @@
       break;
   }
 }
 
 
 main() {
   for (int i = 0; i < TESTS.length;  i += 2) {
     expect(TESTS[i], TESTS[i + 1]);
   }
 }