Add support for compression filters in the mojo dart:io

mojo/dart/embedder/io/mojo_patch.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:nativewrappers';
+
 import 'dart:_mojo/application.dart';
 import 'dart:_mojo/bindings.dart';
 import 'dart:_mojo/core.dart';
 import 'dart:_mojo/mojo/network_error.mojom.dart';
 import 'dart:_mojo_services/mojo/host_resolver.mojom.dart';
 import 'dart:_mojo_services/mojo/net_address.mojom.dart';
 import 'dart:_mojo_services/mojo/network_service.mojom.dart';
 import 'dart:_mojo_services/mojo/tcp_bound_socket.mojom.dart';
 import 'dart:_mojo_services/mojo/tcp_connected_socket.mojom.dart';
 import 'dart:_mojo_services/mojo/tcp_server_socket.mojom.dart';
@@ skipping 277 matching lines @@
   }
 
   static _throwOnError(NetworkError error) {
     if (_okay(error)) {
       return;
     }
     throw new OSError(error.description, error.code);
   }
 }