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

sdk/lib/io/directory_impl.dart

Index: sdk/lib/io/directory_impl.dart
diff --git a/sdk/lib/io/directory_impl.dart b/sdk/lib/io/directory_impl.dart
index b9935caac1a4ac9a5bdc8120c392107420329419..4d51796c2bc04814c60b6e5c16841818cd7287d0 100644
--- a/sdk/lib/io/directory_impl.dart
+++ b/sdk/lib/io/directory_impl.dart
@@ -61,6 +61,10 @@ class _Directory implements Directory {
     return (result == 1);
   }
 
+  Future<FileStat> stat() => FileStat.stat(path);
+
+  FileStat statSync() => FileStat.statSync(path);
+
   // Compute the index of the first directory in the list that exists. If
   // none of the directories exist dirsToCreate.length is returned.
   Future<int> _computeExistingIndex(List dirsToCreate) {