Fix circularity detection for AST-based type inference in the presence of closures.

pkg/analyzer/test/src/summary/resynthesize_ast_test.dart

 // Copyright (c) 2016, 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 analyzer.test.src.summary.resynthesize_ast_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart'
@@ skipping 136 matching lines @@
   }
 
   @override
   void test_canInferAlsoFromStaticAndInstanceFieldsFlagOn() {
     variablesWithNotConstInitializers.add('a2');
     super.test_canInferAlsoFromStaticAndInstanceFieldsFlagOn();
   }
 
   @override
   @failingTest
+  void test_circularReference_viaClosures_initializerTypes() {
+    super.test_circularReference_viaClosures_initializerTypes();
+  }
+
+  @override
+  @failingTest
   void test_genericMethods_inferJSBuiltin() {
     super.test_genericMethods_inferJSBuiltin();
   }
 
   void test_infer_extractIndex_custom() {
     var unit = checkFile('''
 class A {
   String operator [](_) => null;
 }
 var a = new A();
@@ skipping 525 matching lines @@
     }
 
     UnlinkedUnit definingUnit = _getUnlinkedUnit(librarySource);
     LinkedLibraryBuilder linkedLibrary =
         prelink(definingUnit, getPart, getImport);
     linkedLibrary.dependencies.skip(1).forEach((LinkedDependency d) {
       _serializeLibrary(resolveRelativeUri(d.uri));
     });
   }
 }