Share addTypeVariableReference between factory calls and is-checks.

tests/compiler/dart2js_extra/typevariable_factory_test.dart

Index: tests/compiler/dart2js_extra/typevariable_factory_test.dart
diff --git a/tests/language/private_selector_lib.dart b/tests/compiler/dart2js_extra/typevariable_factory_test.dart
similarity index 52%
copy from tests/language/private_selector_lib.dart
copy to tests/compiler/dart2js_extra/typevariable_factory_test.dart
index c9a11c9b34ac40a3d631ffec1f16b497757e62f8..5618cae2caea06d6ff4245fa7c76c1a2fae34f82 100644
--- a/tests/language/private_selector_lib.dart
+++ b/tests/compiler/dart2js_extra/typevariable_factory_test.dart
@@ -2,18 +2,14 @@
 // 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.
 
-library private_selector_lib;
+// Regression test to ensure that we can use type variable in factories.
 
-import 'private_selector_test.dart';
-
-bool executed = false;
-
-class A {
-  public() {
-    new B()._private();
-  }
-
-  _private() {
-    executed = true;
+class A<T> {
+  factory A.foo(o) {
+    Expect.isTrue(o is A<T>);
+    return new A();
   }
+  A();
 }
+
+main() => new A<int>.foo(new A<int>());