[dart:io] Adds Platform.operatingSystemVersion

pkg/dev_compiler/tool/input_sdk/patch/io_patch.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 'dart:_js_helper' show patch;
 
 @patch
 class _Directory {
   @patch
   static _current(_Namespace namespace) {
@@ skipping 216 matching lines @@
   static String _pathSeparator() {
     throw new UnsupportedError("Platform._pathSeparator");
   }
 
   @patch
   static String _operatingSystem() {
     throw new UnsupportedError("Platform._operatingSystem");
   }
 
   @patch
+  static _operatingSystemVersion() {
+    throw new UnsupportedError("Platform._operatingSystemVersion");
+  }
+
+  @patch
   static _localHostname() {
     throw new UnsupportedError("Platform._localHostname");
   }
 
   @patch
   static _executable() {
     throw new UnsupportedError("Platform._executable");
   }
 
   @patch
@@ skipping 396 matching lines @@
   }
 }
 
 @patch
 class _IOService {
   @patch
   static Future _dispatch(int request, List data) {
     throw new UnsupportedError("_IOService._dispatch");
   }
 }