Migrate block 162 to Dart 2.0.

tests/language_2/type_variable_conflict_test.dart

 // 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.
 
 // Test that we report a compile-time error when a type parameter conflicts
 // with an instance or static member with the same name.
 
 import "package:expect/expect.dart";
 
 class G1<T> {
@@ skipping 21 matching lines @@
 }
 
 main() {
   new G1<int>();
   new G2<int>();
   new G3<int>();
   new G4<int>();
   new G5<int>();
   new G6<int>();
 }