Update check for cyclic typedefs.

sdk/lib/_internal/compiler/implementation/elements/elements.dart

 // Copyright (c) 2012, 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.
 
 library elements;
 
 
 import '../tree/tree.dart';
 import '../util/util.dart';
 import '../resolution/resolution.dart';
@@ skipping 699 matching lines @@
   TypedefType get rawType;
   DartType get alias;
   FunctionSignature get functionSignature;
   Link<DartType> get typeVariables;
 
   bool get isResolved;
 
   // TODO(kasperl): Try to get rid of these setters.
   void set alias(DartType value);
   void set functionSignature(FunctionSignature value);
+
+  void checkCyclicReference(Compiler compiler);
 }
 
 abstract class VariableElement extends Element {
   VariableListElement get variables;
 
   // TODO(kasperl): Try to get rid of this.
   Expression get cachedNode;
 }
 
 abstract class FieldParameterElement extends VariableElement {
@@ skipping 243 matching lines @@
   int get resolutionState;
   Token get beginToken;
   Token get endToken;
 
   // TODO(kasperl): Try to get rid of these.
   void set annotatedElement(Element value);
   void set resolutionState(int value);
 
   MetadataAnnotation ensureResolved(Compiler compiler);
 }