Language tests updated to use const instead of final.

tests/language/naming_test.dart

 // Copyright (c) 2011, 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.
 
 class A {
   A() { NamingTest.count++; }
   foo(a, b) {
     Expect.equals(1, a);
     Expect.equals(2, b);
   }
 }
 
 class MyException {
   MyException() {}
 }
 
 class debugger {
-  static final int __PROTO__ = 5;
+  static const int __PROTO__ = 5;
 
   int x;
 
   factory debugger.F() {
     return new debugger(1);
   }
   debugger(x) : this.x = x + 1 { }
   debugger.C(x) : this.x = x + 2 { }
   debugger.C$C(x) : this.x = x + 3 { }
   debugger.C$I(x) : this.x = x + 4 { }
@@ skipping 483 matching lines @@
     var a = new Naming2Test();
     Expect.throws(() => a.foo(2), (e) => e is ObjectNotClosureException);
   }
 }
 
 main() {
   NamingTest.testMain();
   Naming1Test.main(null);
   Naming2Test.main(null);
 }