Update check for cyclic typedefs.

tests/language/cyclic_typedef_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.
 
 // Check that cyclic reference of a typedef is a compile-time error.
 
 // To test various cyclic references the definition of the [:typedef A():] is
 // split over several lines:
 typedef
 
 // Cyclic through return type.
 A /// 01: compile-time error
 
 A // The name of the typedef
 
+// Cyclic through type variable bound.
+<T extends A> /// 10: compile-time error
+
+// Cyclic through generic type variable bound.
+<T extends List<A>> /// 11: compile-time error
+
 ( // The left parenthesis of the typedef arguments.
 
 // Cyclic through parameter type.
 A a /// 02: compile-time error
 
 // Cyclic through optional parameter type.
 [A a] /// 03: compile-time error
 
 // Cyclic through named parameter type.
 {A a} /// 04: compile-time error
 
 // Cyclic through generic parameter type.
 List<A> a /// 05: compile-time error
 
 // Cyclic through return type of function typed parameter.
 A f() /// 06: compile-time error
 
 // Cyclic through parameter type of function typed parameter.
 f(A a) /// 07: compile-time error
 
 // Cyclic through another typedef.
 B b /// 08: compile-time error
 
 // Cyclic through another more typedefs.
 C c /// 09: compile-time error
 
+// Reference through a class is not a cyclic self-reference.
+Class c /// 12: ok
+
+// Reference through a class type bound is not a cyclic self-reference.
+Class c /// 13: ok
+
 ); // The right parenthesis of the typedef arguments.
 
 typedef B(A a);
 typedef C(B b);
 
+class Class
+<T extends A> /// 13: continued
+{
+  A a; /// 12: continued
+}
+
 void testA(A a) {}
 
 void main() {
   testA(null);
 }