Enable constructor name check by default

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);
   }
@@ skipping 470 matching lines @@
   $add(Object other) => other;
   $negate() => wrapped;
 
   operator +(Object other) => 123;
   operator -() => 444;
 }
 
 $add(Object first, Object second) => second;
 DartQuery $(Object obj) => new DartQuery(obj);
 
-// Ensure we don't have false positive. named constructor and methods
-// are in different namespaces, therefore it is ok to have a method
-// called foo and a named constructor CLASS.foo
-class Naming1Test {
-  Naming1Test.foo() { }
-  foo() { }
-
-  static void main(args) {
-    var a = new Naming1Test.foo();
-    a.foo();
-  }
-}
 
 // Ensure we don't have false positive.
 class Naming2Test {
   Naming2Test() { }
   int get foo { return 1; }
   set foo(x) { }
 
   static void main(args) {
     var a = new Naming2Test();
     Expect.throws(
         () => a.foo(2),
         // We check for both exceptions because the exact exception to
         // throw is hard to compute on some browsers.
         // Also, ObjectNotClosureException should probably implement
         // NoSuchMethodError.
         (e) => e is ObjectNotClosureException || e is NoSuchMethodError);
   }
 }
 
 main() {
   NamingTest.testMain();
-  Naming1Test.main(null);
   Naming2Test.main(null);
 }