Merge the dart:uri library into dart:core and update the Uri class

samples/swarm/swarm_ui_lib/util/Uri.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 utilslib;
 
 /**
  * A parsed URI, inspired by:
  * http://closure-library.googlecode.com/svn/docs/class_goog_Uri.html
  */
-class Uri extends uri.Uri {
+class Uri extends core.Uri {
   /**
    * Parses a URL query string into a map. Because you can have multiple values
    * for the same parameter name, each parameter name maps to a list of
    * values. For example, '?a=b&c=d&a=e' would be parsed as
    * [{'a':['b','e'],'c':['d']}].
    */
   // TODO(jmesserly): consolidate with Uri.parse(...)
   static Map<String, List<String>> parseQuery(String queryString) {
     final queryParams = new Map<String, List<String>>();
     if (queryString.startsWith('?')) {
@@ skipping 48 matching lines @@
     return component.replaceAll('%3A', ':')
                     .replaceAll('%2F', '/')
                     .replaceAll('%3F', '?')
                     .replaceAll('%3D', '=')
                     .replaceAll('%26', '&')
                     .replaceAll('%20', ' ');
   }
 
   Uri(String uri) : super(uri);
 }