Serialize exports scopes.

pkg/front_end/lib/src/fasta/dill/dill_loader.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 fasta.dill_loader;
 
 import 'dart:async' show Future;
 
 import 'package:kernel/ast.dart' show Library, Program, Source;
 
+import '../kernel/kernel_builder.dart' show LibraryBuilder;
+
 import '../loader.dart' show Loader;
 
 import '../problems.dart' show unhandled;
 
 import '../target_implementation.dart' show TargetImplementation;
 
 import 'dill_library_builder.dart' show DillLibraryBuilder;
 
 class DillLoader extends Loader<Library> {
   /// Source targets are compiled against these binary libraries.
@@ skipping 27 matching lines @@
     }
     builder.library.classes.forEach(builder.addClass);
     builder.library.procedures.forEach(builder.addMember);
     builder.library.typedefs.forEach(builder.addTypedef);
     builder.library.fields.forEach(builder.addMember);
   }
 
   Future<Null> buildBody(DillLibraryBuilder builder) {
     return buildOutline(builder);
   }
+
+  void finalizeExports() {
+    builders.forEach((Uri uri, LibraryBuilder builder) {
+      DillLibraryBuilder library = builder;
+      library.finalizeExports();
+    });
+  }
 }