Make sure the type arguments of the supertype of a class are being added to the isCheck set. That s…

tests/language/type_argument_in_super_type_test.dart

Index: tests/language/type_argument_in_super_type_test.dart
===================================================================
--- tests/language/type_argument_in_super_type_test.dart	(revision 0)
+++ tests/language/type_argument_in_super_type_test.dart	(revision 0)
@@ -0,0 +1,35 @@
+// 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.
+
+import "package:expect/expect.dart";
+
+class C {
+}
+
+class A<T> {
+  var field;
+  A(this.field);
+  T foo() => field;
+  int bar() => field;
+}
+
+class B extends A<C> {
+  B() : super(new C());
+}
+
+main() {
+  B b = new B();
+  Expect.equals(b.field, b.foo());
+  bool isCheckedMode = false;
+  try {
+    String a = 42;
+  } catch (e) {
+    isCheckedMode = true;
+  }
+  if (isCheckedMode) {
+    Expect.throws(b.bar, (e) => e is TypeError);
+  } else {
+    Expect.equals(b.field, b.bar());
+  }
+}