Update pkg/http to use the new async APIs.

pkg/http/test/utils.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.
 
 library test_utils;
 
+import 'dart:async';
 import 'dart:io';
 import 'dart:json' as json;
 import 'dart:uri';
 
 import 'package:unittest/unittest.dart';
 import 'package:http/http.dart' as http;
 import 'package:http/src/utils.dart';
 
 /// The current server instance.
 HttpServer _server;
@@ skipping 80 matching lines @@
 
   _server.listen("127.0.0.1", 0);
 }
 
 /// Stops the current HTTP server.
 void stopServer() {
   _server.close();
   _server = null;
 }
 
+// TODO(nweiz): remove this once issue 7785 is fixed.
+/// Buffers all input from an InputStream and returns it as a future.
+Future<List<int>> consumeInputStream(InputStream stream) =>
+  new http.ByteStream(wrapInputStream(stream)).toBytes();
+
 /// A matcher that matches JSON that parses to a value that matches the inner
 /// matcher.
 Matcher parse(matcher) => new _Parse(matcher);
 
 class _Parse extends BaseMatcher {
   final Matcher _matcher;
 
   _Parse(this._matcher);
 
   bool matches(item, MatchState matchState) {
@@ skipping 48 matching lines @@
 const Matcher throwsRedirectLimitExceededException =
     const Throws(isRedirectLimitExceededException);
 
 class _RedirectLimitExceededException extends TypeMatcher {
   const _RedirectLimitExceededException() :
       super("RedirectLimitExceededException");
 
   bool matches(item, MatchState matchState) =>
     item is RedirectLimitExceededException;
 }