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

pkg/scheduled_test/lib/scheduled_server.dart

 // Copyright (c) 2013, 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 scheduled_test.scheduled_server;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:io';
-import 'dart:uri';
 
 import 'scheduled_test.dart';
 import 'src/utils.dart';
 import 'src/scheduled_server/handler.dart';
 import 'src/scheduled_server/safe_http_server.dart';
 
 typedef Future ScheduledHandler(HttpRequest request);
 
 /// A class representing an [HttpServer] that's scheduled to run in the course
 /// of the test. This class allows the server's request handling to be scheduled
@@ skipping 76 matching lines @@
             "when no more requests were expected.";
       }
       return _handlers.removeFirst().fn(request);
     }).catchError((e) {
       // Close the server so that we don't leave a dangling request.
       _server.then((s) => s.close());
       throw e;
     }), 'receiving ${request.method} ${request.uri}');
   }
 }