dart:io | Add .stat() and .statSync() to FileSystemEntity and subclasses File, Directory, and Link.

sdk/lib/io/link.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;
 
 /**
  * [Link] objects are references to filesystem links.
  *
  */
-abstract class Link extends FileSystemEntity {
+abstract class Link implements FileSystemEntity {
   /**
    * Creates a Link object.
    */
   factory Link(String path) => new _Link(path);
 
   /**
    * Creates a Link object from a Path object.
    */
   factory Link.fromPath(Path path) => new _Link.fromPath(path);
 
@@ skipping 90 matching lines @@
   _Link(String this.path);
 
   _Link.fromPath(Path inputPath) : path = inputPath.toNativePath();
 
   String toString() => "Link: '$path'";
 
   Future<bool> exists() => FileSystemEntity.isLink(path);
 
   bool existsSync() => FileSystemEntity.isLinkSync(path);
 
+  Future<FileStat> stat() => FileStat.stat(path);
+
+  FileStat statSync() => FileStat.statSync(path);
+
   Future<Link> create(String target) {
     _ensureFileService();
     if (Platform.operatingSystem == 'windows') {
       target = _makeWindowsLinkTarget(target);
     }
     List request = new List(3);
     request[0] = _CREATE_LINK_REQUEST;
     request[1] = path;
     request[2] = target;
     return _fileService.call(request).then((response) {
@@ skipping 127 matching lines @@
       if (path != null) {
         sb.write(", path = $path");
       }
     }
     return sb.toString();
   }
   final String message;
   final String path;
   final OSError osError;
 }