Make method overrides with differing parameters a compile-time error

tests/language/src/ClassOverrideNegativeTest.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.
 
-// Test fails in checked mode because incompatible overriding method
-// VMOptions=--enable_type_checks
+// 8.1 Methods: It is a compile-time error if an interface method m1 overrides 
+// an interface method m2 and has a different number of required parameters.
 
 class A {
   foo() {}
 }
 
 class B extends A {
   foo(a) { }
 }
 
-class ClassOverrideNegativeTest {
-  static testMain() {
-  }
+main() {
+  B instance = new B();
+  instance.foo(1);
+  print("Success");
 }
-
-main() {
-  ClassOverrideNegativeTest.testMain();
-}