dart:io | Add FileSystemEntity.stat() and FileStat class.

sdk/lib/io/file_impl.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.
 
 part of dart.io;
 
 // Read the file in blocks of size 64k.
 const int _BLOCK_SIZE = 64 * 1024;
 
 
@@ skipping 182 matching lines @@
 const int _READ_BYTE_REQUEST = 14;
 const int _WRITE_BYTE_REQUEST = 15;
 const int _READ_REQUEST = 16;
 const int _READ_LIST_REQUEST = 17;
 const int _WRITE_LIST_REQUEST = 18;
 const int _CREATE_LINK_REQUEST = 19;
 const int _DELETE_LINK_REQUEST = 20;
 const int _LINK_TARGET_REQUEST = 21;
 const int _TYPE_REQUEST = 22;
 const int _IDENTICAL_REQUEST = 23;
+const int _STAT_REQUEST = 24;
 
 // TODO(ager): The only reason for this class is that the patching
 // mechanism doesn't seem to like patching a private top level
 // function.
 class _FileUtils {
   external static SendPort _newServicePort();
 }
 
 // Class for encapsulating the native implementation of files.
 class _File implements File {
@@ skipping 797 matching lines @@
           new FileIOException("File closed '$_path'"));
     });
     return completer.future;
   }
 
   final String _path;
   int _id;
 
   SendPort _fileService;
 }