Fix ALL the pub tests.

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';
@@ skipping 160 matching lines @@
 const Matcher throwsRedirectLimitExceededException =
     const Throws(isRedirectLimitExceededException);
 
 class _RedirectLimitExceededException extends TypeMatcher {
   const _RedirectLimitExceededException() :
       super("RedirectLimitExceededException");
 
   bool matches(item, MatchState matchState) =>
     item is RedirectLimitExceededException;
 }
+
+/// A matcher for SocketIOExceptions.
+const isSocketIOException = const _SocketIOException();
+
+/// A matcher for functions that throw SocketIOException.
+const Matcher throwsSocketIOException =
+    const Throws(isSocketIOException);
+
+class _SocketIOException extends TypeMatcher {
+  const _SocketIOException() : super("SocketIOException");
+  bool matches(item, MatchState matchState) => item is SocketIOException;
+}