unfork DDC's copy of most SDK libraries

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() {
@@ skipping 117 matching lines @@
   }
   @patch
   static _lengthFromPath(String path) {
     throw new UnsupportedError("File._lengthFromPath");
   }
   @patch
   static _lastModified(String path) {
     throw new UnsupportedError("File._lastModified");
   }
   @patch
+  static _lastAccessed(String path) {
+    throw new UnsupportedError("File._lastAccessed");
+  }
+  @patch
+  static _setLastModified(String path, int millis) {
+    throw new UnsupportedError("File._setLastModified");
+  }
+  @patch
+  static _setLastAccessed(String path, int millis) {
+    throw new UnsupportedError("File._setLastAccessed");
+  }
+  @patch
   static _open(String path, int mode) {
     throw new UnsupportedError("File._open");
   }
   @patch
   static int _openStdio(int fd) {
     throw new UnsupportedError("File._openStdio");
   }
 }
 
 @patch
@@ skipping 380 matching lines @@
   }
 }
 
 @patch
 class _IOService {
   @patch
   static Future _dispatch(int request, List data) {
     throw new UnsupportedError("_IOService._dispatch");
   }
 }