Fix flaky http test and reenable on buildbots.

tests/standalone/io/http_basic_test.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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 #import("dart:isolate");
@@ skipping 124 matching lines @@
     Expect.equals("www.dartlang.org:1234", request.headers["Host"][0]);
     Expect.equals("www.dartlang.org", request.headers.host);
     Expect.equals(1234, request.headers.port);
     response.statusCode = HttpStatus.OK;
     response.outputStream.close();
   }
 
   void init() {
     // Setup request handlers.
     _requestHandlers = new Map();
-    _requestHandlers["/echo"] = (HttpRequest request, HttpResponse response) {
-      _echoHandler(request, response);
-    };
-    _requestHandlers["/0123456789"] =
-        (HttpRequest request, HttpResponse response) {
-          _zeroToTenHandler(request, response);
-        };
-    _requestHandlers["/reasonformoving"] =
-        (HttpRequest request, HttpResponse response) {
-          _reasonForMovingHandler(request, response);
-        };
-    _requestHandlers["/host"] =
-        (HttpRequest request, HttpResponse response) {
-          _hostHandler(request, response);
-        };
+    _requestHandlers["/echo"] = _echoHandler;
+    _requestHandlers["/0123456789"] = _zeroToTenHandler;
+    _requestHandlers["/reasonformoving"] = _reasonForMovingHandler;
+    _requestHandlers["/host"] = _hostHandler;
   }
 
   void dispatch(var message, SendPort replyTo) {
     if (message.isStart) {
       _server = new HttpServer();
       try {
         _server.listen("127.0.0.1", 0);
-        _server.defaultRequestHandler = (HttpRequest req, HttpResponse rsp) {
-          _requestReceivedHandler(req, rsp);
-        };
+        _server.defaultRequestHandler = _requestReceivedHandler;
         replyTo.send(new TestServerStatus.started(_server.port), null);
       } catch (e) {
         replyTo.send(new TestServerStatus.error(), null);
       }
     } else if (message.isStop) {
       _server.close();
       port.close();
       replyTo.send(new TestServerStatus.stopped(), null);
     } else if (message.isChunkedEncoding) {
       _chunkedEncoding = true;
@@ skipping 94 matching lines @@
 }
 
 void test404() {
   TestServerMain testServerMain = new TestServerMain();
   testServerMain.setServerStartedHandler((int port) {
     HttpClient httpClient = new HttpClient();
     HttpClientConnection conn =
         httpClient.get("127.0.0.1", port, "/thisisnotfound");
     conn.onResponse = (HttpClientResponse response) {
       Expect.equals(HttpStatus.NOT_FOUND, response.statusCode);
-      httpClient.shutdown();
-      testServerMain.shutdown();
+      var body = new StringBuffer();
+      var stream = response.inputStream;
+      stream.onData = () => body.add(new String.fromCharCodes(stream.read()));
+      stream.onClosed = () {
+        Expect.equals("Page not found", body.toString());
+        httpClient.shutdown();
+        testServerMain.shutdown();
+      };
     };
   });
   testServerMain.start();
 }
 
 void testReasonPhrase() {
   TestServerMain testServerMain = new TestServerMain();
   testServerMain.setServerStartedHandler((int port) {
     HttpClient httpClient = new HttpClient();
     HttpClientConnection conn =
         httpClient.get("127.0.0.1", port, "/reasonformoving");
     conn.followRedirects = false;
     conn.onResponse = (HttpClientResponse response) {
       Expect.equals(HttpStatus.MOVED_PERMANENTLY, response.statusCode);
       Expect.equals("Don't come looking here any more", response.reasonPhrase);
-      httpClient.shutdown();
-      testServerMain.shutdown();
+      var stream = response.inputStream;
+      stream.onData = () => Expect.fail("No data expected");
+      stream.onClosed = () {
+        httpClient.shutdown();
+        testServerMain.shutdown();
+      };
     };
   });
   testServerMain.start();
 }
 
 void main() {
   testStartStop();
   testGET();
   testPOST(true);
   testPOST(false);
   test404();
   testReasonPhrase();
 }