Make the computation of import chain to disallowed library use correct uri.

pkg/compiler/lib/src/compiler.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.compiler_base;
 
 import 'dart:async' show
     EventSink,
     Future;
 
@@ skipping 665 matching lines @@
   ///
   /// [loadedLibraries] contains the newly loaded libraries.
   ///
   /// The method returns a [Future] allowing for the loading of additional
   /// libraries.
   Future onLibrariesLoaded(LoadedLibraries loadedLibraries) {
     return new Future.sync(() {
       for (Uri uri in disallowedLibraryUris) {
         if (loadedLibraries.containsLibrary(uri)) {
           Set<String> importChains =
-              computeImportChainsFor(loadedLibraries, Uri.parse('dart:io'));
+              computeImportChainsFor(loadedLibraries, uri);
           reporter.reportInfo(NO_LOCATION_SPANNABLE,
              MessageKind.DISALLOWED_LIBRARY_IMPORT,
               {'uri': uri,
                'importChain': importChains.join(
                    MessageTemplate.DISALLOWED_LIBRARY_IMPORT_PADDING)});
         }
       }
 
       if (!loadedLibraries.containsLibrary(Uris.dart_core)) {
         return null;
@@ skipping 1348 matching lines @@
     if (_otherDependencies == null) {
       _otherDependencies = new Setlet<Element>();
     }
     _otherDependencies.add(element.implementation);
   }
 
   Iterable<Element> get otherDependencies {
     return _otherDependencies != null ? _otherDependencies : const <Element>[];
   }
 }