Make HttpClient not send fragments as part of request.

tests/standalone/io/http_requested_uri_test.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.
 
 import "package:expect/expect.dart";
 import "package:async_helper/async_helper.dart";
 import "dart:async";
 import "dart:io";
 
-const PATH = '/path?a=b#c';
+const sendPath = '/path?a=b#c';
+const expectedPath = '/path?a=b';
 
 void test(String expected, Map headers) {
   asyncStart();
   HttpServer.bind("localhost", 0).then((server) {
     expected = expected.replaceAll('%PORT', server.port.toString());
     server.listen((request) {
-      Expect.equals("$expected$PATH",
+      Expect.equals("$expected$expectedPath",
                     request.requestedUri.toString());
       request.response.close();
     });
     HttpClient client = new HttpClient();
-    client.get("localhost", server.port, PATH)
+    client.get("localhost", server.port, sendPath)
       .then((request) {
         for (var v in headers.keys) {
           if (headers[v] != null) {
             request.headers.set(v, headers[v]);
           } else {
             request.headers.removeAll(v);
           }
         }
         return request.close();
       })
       .then((response) => response.drain())
       .then((_) {
         server.close();
         asyncEnd();
       });
   });
 }
 
 
 void main() {
   test('http://localhost:%PORT', {});
   test('https://localhost:%PORT', {'x-forwarded-proto': 'https'});
   test('ws://localhost:%PORT', {'x-forwarded-proto': 'ws'});
   test('http://my-host:321', {'x-forwarded-host': 'my-host:321'});
   test('http://localhost:%PORT', {'host': null});
 }