Rip out the last dart:io dependency from pkg/http.

pkg/http/test/io/http_test.dart

Index: pkg/http/test/io/http_test.dart
diff --git a/pkg/http/test/http_test.dart b/pkg/http/test/io/http_test.dart
similarity index 99%
rename from pkg/http/test/http_test.dart
rename to pkg/http/test/io/http_test.dart
index 69bc43d961a6ccef883595b402537e28d743aa7f..9ba5924bb687a1e18101846d6f968c9f7fb8797f 100644
--- a/pkg/http/test/http_test.dart
+++ b/pkg/http/test/io/http_test.dart
@@ -1,8 +1,8 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2014, 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 http_test;
+library http.test.io.http_test;
 
 import 'package:http/http.dart' as http;
 import 'package:unittest/unittest.dart';