Create a URI class in utils/ (based on client/util/).

dart/client/util/utilslib.dart

Index: dart/client/util/utilslib.dart
diff --git a/dart/client/util/utilslib.dart b/dart/client/util/utilslib.dart
index 76b629d9c8e867e70a501667ac9d1d0ca5fdf4fd..d81d397b2babece257cda6329c3ab3bb41040fb8 100644
--- a/dart/client/util/utilslib.dart
+++ b/dart/client/util/utilslib.dart
@@ -1,10 +1,11 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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('utilslib');
 
 #import('../observable/observable.dart');
+#import('../../utils/uri/uri.dart', prefix: 'uri');
 
 #source('CollectionUtils.dart');
 #source('DateUtils.dart');