Support compilation of Hello World

pkg/compiler/lib/src/enqueue.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 dart2js.enqueue;
 
 import 'dart:collection' show Queue;
 
 import 'common/codegen.dart' show CodegenWorkItem;
 import 'common/names.dart' show Identifiers;
@@ skipping 291 matching lines @@
               superclass.isClosure ||
               compiler.enqueuer.resolution.isClassProcessed(superclass),
               message: "Class $superclass has not been "
                        "processed in resolution."));
         }*/
 
         _processedClasses.add(superclass);
         recentClasses.add(superclass);
         superclass.ensureResolved(resolution);
         superclass.implementation.forEachMember(processInstantiatedClassMember);
-        if (isResolutionQueue && !superclass.isSynthesized) {
+        if (isResolutionQueue &&
+            !compiler.serialization.isDeserialized(superclass)) {
           compiler.resolver.checkClass(superclass);
         }
         // We only tell the backend once that [superclass] was instantiated, so
         // any additional dependencies must be treated as global
         // dependencies.
         compiler.backend.registerInstantiatedClass(
             superclass, this, compiler.globalDependencies);
       }
 
       ClassElement superclass = cls;
@@ skipping 713 matching lines @@
   @override
   void visitStaticUse(StaticUse staticUse) {
     enqueuer.registerStaticUse(staticUse);
   }
 
   @override
   void visitTypeUse(TypeUse typeUse) {
     enqueuer.registerTypeUse(typeUse);
   }
 }