Insert the right checks for redirecting factories to deferred constructors.

pkg/compiler/lib/src/elements/modelx.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.
 
 library elements.modelx;
 
 import 'elements.dart';
 import '../constants/expressions.dart';
 import '../helpers/helpers.dart';  // Included for debug helpers.
 import '../tree/tree.dart';
@@ skipping 1942 matching lines @@
     implements ConstructorElement {
   bool isRedirectingGenerative = false;
 
   ConstructorElementX(String name,
                       ElementKind kind,
                       Modifiers modifiers,
                       Element enclosing)
         : super(name, kind, modifiers, enclosing, false);
 
   FunctionElement immediateRedirectionTarget;
+  PrefixElement redirectionDeferredPrefix;
 
   bool get isRedirectingFactory => immediateRedirectionTarget != null;
 
+  // TODO(johnniwinther): This should also return true for cyclic redirecting
+  // generative constructors.
+  bool get isCyclicRedirection => effectiveTarget.isRedirectingFactory;
+
   /// This field is set by the post process queue when checking for cycles.
   ConstructorElement internalEffectiveTarget;
   DartType effectiveTargetType;
 
   void set effectiveTarget(ConstructorElement constructor) {
     assert(constructor != null && internalEffectiveTarget == null);
     internalEffectiveTarget = constructor;
   }
 
   ConstructorElement get effectiveTarget {
@@ skipping 1149 matching lines @@
   AstElement get definingElement;
 
   bool get hasResolvedAst => definingElement.hasTreeElements;
 
   ResolvedAst get resolvedAst {
     return new ResolvedAst(declaration,
         definingElement.node, definingElement.treeElements);
   }
 
 }