Include internal library members when enqueuing everything.

sdk/lib/_internal/compiler/implementation/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.
 
 part of dart2js;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
   final CodegenEnqueuer codegen;
 
   /// A reverse map from name to *all* elements with that name, not
   /// just instance members of instantiated classes.
   final Map<String, Link<Element>> allElementsByName
       = new Map<String, Link<Element>>();
 
   void ensureAllElementsByName() {
     if (!allElementsByName.isEmpty) return;
 
     void addMemberByName(Element element) {
       element = element.declaration;
       String name = element.name;
       ScopeContainerElement container = null;
       if (element.isLibrary) {
         LibraryElement library = element;
-        // Don't include private implementation libraries.  These
-        // libraries contain special classes that cause problems
-        // in other parts of the resolver (in particular Null and Void).
-        // TODO(ahe): Consider lifting this restriction.
-        if (!library.isInternalLibrary) {
-          container = library;
-          // TODO(ahe): Is this right?  Is this necessary?
-          name = library.getLibraryOrScriptName();
-        }
+        container = library;
+        // TODO(ahe): Is this right?  Is this necessary?
+        name = library.getLibraryOrScriptName();
       } else if (element.isClass) {
         ClassElement cls = element;
         cls.ensureResolved(compiler);
         container = cls;
         for (var link = cls.computeTypeParameters(compiler);
              !link.isEmpty;
              link = link.tail) {
           addMemberByName(link.head.element);
         }
       }
@@ skipping 726 matching lines @@
     }
     CodegenWorkItem workItem = new CodegenWorkItem(
         element, itemCompilationContextCreator());
     queue.add(workItem);
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }