Test closed world model after deserialization.

pkg/compiler/lib/src/elements/common.dart

 // Copyright (c) 2015, 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.
 
 /// Mixins that implement convenience methods on [Element] subclasses.
 
 library elements.common;
 
 import '../common/names.dart' show
     Names,
     Uris;
+import '../core_types.dart' show
+    CoreClasses;
 import '../dart_types.dart' show
     DartType,
     InterfaceType,
     FunctionType;
 import '../util/util.dart' show
     Link;
 
 import 'elements.dart';
 
 abstract class ElementCommon implements Element {
@@ skipping 401 matching lines @@
     return false;
   }
 
   @override
   bool implementsInterface(ClassElement intrface) {
     return this != intrface &&
         allSupertypesAndSelf.asInstanceOf(intrface) != null;
   }
 
   @override
+  bool implementsFunction(CoreClasses coreClasses) {
+    return asInstanceOf(coreClasses.functionClass) != null ||
+        callType != null;
+  }
+
+  @override
   bool isSubclassOf(ClassElement cls) {
     // Use [declaration] for both [this] and [cls], because
     // declaration classes hold the superclass hierarchy.
     cls = cls.declaration;
     for (ClassElement s = declaration; s != null; s = s.superclass) {
       if (identical(s, cls)) return true;
     }
     return false;
   }
 
@@ skipping 94 matching lines @@
   }
 
   @override
   void forEachLocalMember(void f(Element member)) {
     constructors.forEach(f);
     if (mixin != null) mixin.forEachLocalMember((Element mixedInElement) {
       if (mixedInElement.isInstanceMember) f(mixedInElement);
     });
   }
 }