Properly resynthesize ClassElementImpl.hasBeenInferred.

pkg/analyzer/lib/src/summary/resynthesize.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.
 
 library summary_resynthesizer;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 931 matching lines @@
       }).toList();
     }
   }
 
   /**
    * Resynthesize a [ClassElement] and place it in [unitHolder].
    */
   void buildClass(UnlinkedClass serializedClass) {
     ClassElementImpl classElement =
         new ClassElementImpl(serializedClass.name, serializedClass.nameOffset);
+    classElement.hasBeenInferred = summaryResynthesizer.strongMode;
     classElement.typeParameters =
         buildTypeParameters(serializedClass.typeParameters);
     classElement.abstract = serializedClass.isAbstract;
     classElement.mixinApplication = serializedClass.isMixinApplication;
     InterfaceTypeImpl correspondingType = new InterfaceTypeImpl(classElement);
     if (serializedClass.supertype != null) {
       classElement.supertype = buildType(serializedClass.supertype);
     } else if (!serializedClass.hasNoSupertype) {
       if (isCoreLibrary) {
         delayedObjectSubclasses.add(classElement);
@@ skipping 1484 matching lines @@
     List<DartType> typeArguments = const <DartType>[];
     if (numTypeArguments != 0) {
       typeArguments = <DartType>[];
       for (int i = 0; i < numTypeArguments; i++) {
         typeArguments.add(getTypeArgument(i));
       }
     }
     return typeArguments;
   }
 }