Add HTTP handler registration to the HTTP server

tests/standalone/src/io/HttpServerSocketTest.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.
 
 #import("dart:io");
 #import("dart:isolate");
 
 class ExpectedDataOutputStream implements OutputStream {
   ExpectedDataOutputStream(List<int> this._data,
                            int this._cutoff,
@@ skipping 154 matching lines @@
   HttpServer server = new HttpServer();
   server.listenOn(serverSocket);
   void testContent(String request,
                    String response,
                    [int okayFrom = 0,
                     bool expectError = true]) {
     // Inner callback to actually run a given setting.
     void runSettings(int cutoff,
                      bool closeAsError,
                      bool expectError) {
-      server.onRequest = (HttpRequest request, HttpResponse response) {
-        request.inputStream.onData = () {
-        };
-        request.inputStream.onClosed = () {
-          response.outputStream.close();
-        };
-      };
+      server.defaultRequestHandler =
+          (HttpRequest request, HttpResponse response) {
+            request.inputStream.onData = () {
+            };
+            request.inputStream.onClosed = () {
+              response.outputStream.close();
+            };
+          };
 
       if (expectError) {
         ReceivePort port = new ReceivePort();
         server.onError = (Exception error) {
           port.close();
         };
       } else {
         server.onError = (Exception error) {
           Expect.fail("An error was not expected: $error");
         };
@@ skipping 12 matching lines @@
       "GET / HTTP/1.1\r\nKeep-Alive: False\r\n\r\n",
       "HTTP/1.1 200 OK\r\ntransfer-encoding: chunked\r\nconnection: close" +
       "\r\n\r\n0\r\n\r\n");
 
   server.close();
 }
 
 void main() {
   testSocketClose();
 }