Clean up dart:io exceptions.

tests/standalone/io/socket_invalid_arguments_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";
 
 class NotAnInteger {
   operator==(other) => other == 1;
   operator<(other) => other > 1;
   operator+(other) => 1;
 }
 
 class NotAList {
   get length => 10;
   operator[](index) => 1;
 }
 
 testSocketCreation(host, port) {
   Socket.connect(host, port)
       .then((socket) => Expect.fail("Shouldn't get connected"))
-      .catchError((e) => null, test: (e) => e is SocketIOException)
+      .catchError((e) => null, test: (e) => e is SocketException)
       .catchError((e) => null, test: (e) => e is ArgumentError);
 }
 
 testAdd(buffer) {
   ServerSocket.bind("127.0.0.1", 0).then((server) {
     server.listen((socket) => socket.destroy());
     Socket.connect("127.0.0.1", server.port).then((socket) {
       int errors = 0;
       socket.done.catchError((e) { errors++; });
       socket.listen(
@@ skipping 31 matching lines @@
   testAdd(42);
   // TODO(8233): Throw ArgumentError from API implementation.
   // testAdd([-1]);
   // testAdd([2222222222222222222222222222222]);
   // testAdd([1, 2, 3, null]);
   // testAdd([new NotAnInteger()]);
   testServerSocketCreation(123, 123, 123);
   testServerSocketCreation("string", null, null);
   testServerSocketCreation("string", 123, null);
 }