Support new malformed types semantics.

tests/language/malformed_inheritance_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.
+
+// Tests that malformed types used in extends, implements, and with clauses
+// cause compile-time errors.
+
+import 'package:expect/expect.dart';
+
+class A<T> {}
+
+class C
+  extends Unresolved /// 01: compile-time error
+  extends A<Unresolved> /// 02: static type warning
+  extends Object with Unresolved /// 03: compile-time error
+  extends Object with A<Unresolved> /// 04: static type warning
+  implements Unresolved /// 05: compile-time error
+  implements A<Unresolved> /// 06: static type warning
+{
+
+}
+
+void main() {
+  new C();
+  Expect.isTrue(new C() is A<String> && new C() is A<int>); /// 02: continued
+  Expect.isTrue(new C() is A<String> && new C() is A<int>); /// 04: continued
+  Expect.isTrue(new C() is A<String> && new C() is A<int>); /// 06: continued
+}