Prepare for separate setter scope.

pkg/front_end/lib/src/fasta/source/source_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.source_loader;
 
 import 'dart:async' show Future;
 
 import 'dart:io' show FileSystemException;
 
@@ skipping 182 matching lines @@
     });
     ticker.logMs("Computed library scopes");
     // debugPrintExports();
   }
 
   void debugPrintExports() {
     // TODO(sigmund): should be `covarint SourceLibraryBuilder`.
     builders.forEach((Uri uri, dynamic l) {
       SourceLibraryBuilder library = l;
       Set<Builder> members = new Set<Builder>();
-      library.members.forEach((String name, Builder member) {
+      library.forEach((String name, Builder member) {
         while (member != null) {
           members.add(member);
           member = member.next;
         }
       });
       List<String> exports = <String>[];
       library.exports.forEach((String name, Builder member) {
         while (member != null) {
           if (!members.contains(member)) {
             exports.add(name);
@@ skipping 148 matching lines @@
   void checkOverrides(List<SourceClassBuilder> sourceClasses) {
     assert(hierarchy != null);
     for (SourceClassBuilder builder in sourceClasses) {
       builder.checkOverrides(hierarchy);
     }
     ticker.logMs("Checked overrides");
   }
 
   List<Uri> getDependencies() => sourceBytes.keys.toList();
 }