Delay HttpClientResponse until HttpClientRequest is fully sent.

tests/standalone/io/http_client_request_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 "dart:io";
 import "dart:isolate";
 import "dart:typeddata";
 
 void testClientRequest(void handler(request)) {
@@ skipping 11 matching lines @@
       })
       .then((response) {
         response.listen((_) {}, onDone: () {
           client.close();
           server.close();
         });
       })
       .catchError((error) {
         server.close();
         client.close();
-      }, test: (e) => e is HttpParserException);
+      });
   });
 }
 
 void testResponseDone() {
   testClientRequest((request) {
     request.close();
-    request.done.then((req) {
-      Expect.equals(request, req);
+    request.done.then((res1) {
+      request.response.then((res2) {
+        Expect.equals(res1, res2);
+      });
     });
     return request.response;
   });
 }
 
 void testBadResponseAdd() {
   testClientRequest((request) {
     var port = new ReceivePort();
     request.contentLength = 0;
     request.writeBytes([0]);
@@ skipping 51 matching lines @@
     }, test: (e) => e is HttpException);
     return request.response;
   });
 }
 
 void main() {
   testResponseDone();
   testBadResponseAdd();
   testBadResponseClose();
 }