Implement ClassMirror.owner and LibraryMirror.uri.

dart/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;
 
 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.slowToString();
       Link<Element> members = const Link<Element>();
       if (element.isLibrary()) {
         LibraryElementX library = element;
         Uri uri = library.canonicalUri;
-        if (uri.scheme != 'dart' && !uri.path.startsWith('_')) {
+        // 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 (uri.scheme != 'dart' || !uri.path.startsWith('_')) {
           members = library.localMembers;
           // TODO(ahe): Is this right?  Is this necessary?
           name = library.getLibraryOrScriptName();
         }
       } else if (element.isClass() && !element.isMixinApplication) {
         // TODO(ahe): Investigate what makes mixin applications crash
         // this method.
         ClassElementX cls = element;
         cls.ensureResolved(compiler);
         members = cls.localMembers;
@@ skipping 674 matching lines @@
     while(!queue.isEmpty) {
       // TODO(johnniwinther): Find an optimal process order for codegen.
       f(queue.removeLast());
     }
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }