Implement @patch annotation for patch class members

runtime/bin/file_patch.dart

 // Copyright (c) 2012, 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.
 
 @patch class _File {
-  /* @patch */ static _exists(String path) native "File_Exists";
-  /* @patch */ static _create(String path) native "File_Create";
-  /* @patch */ static _createLink(String path, String target)
+  @patch static _exists(String path) native "File_Exists";
+  @patch static _create(String path) native "File_Create";
+  @patch static _createLink(String path, String target)
       native "File_CreateLink";
-  /* @patch */ static _linkTarget(String path) native "File_LinkTarget";
-  /* @patch */ static _deleteNative(String path) native "File_Delete";
-  /* @patch */ static _deleteLinkNative(String path) native "File_DeleteLink";
-  /* @patch */ static _rename(String oldPath, String newPath)
+  @patch static _linkTarget(String path) native "File_LinkTarget";
+  @patch static _deleteNative(String path) native "File_Delete";
+  @patch static _deleteLinkNative(String path) native "File_DeleteLink";
+  @patch static _rename(String oldPath, String newPath)
       native "File_Rename";
-  /* @patch */ static _renameLink(String oldPath, String newPath)
+  @patch static _renameLink(String oldPath, String newPath)
       native "File_RenameLink";
-  /* @patch */ static _copy(String oldPath, String newPath) native "File_Copy";
-  /* @patch */ static _lengthFromPath(String path) native "File_LengthFromPath";
-  /* @patch */ static _lastModified(String path) native "File_LastModified";
-  /* @patch */ static _open(String path, int mode) native "File_Open";
-  /* @patch */ static int _openStdio(int fd) native "File_OpenStdio";
+  @patch static _copy(String oldPath, String newPath) native "File_Copy";
+  @patch static _lengthFromPath(String path) native "File_LengthFromPath";
+  @patch static _lastModified(String path) native "File_LastModified";
+  @patch static _open(String path, int mode) native "File_Open";
+  @patch static int _openStdio(int fd) native "File_OpenStdio";
 }
 
 
 @patch class _RandomAccessFileOps {
-  /* @patch */ factory _RandomAccessFileOps(int pointer)
+  @patch factory _RandomAccessFileOps(int pointer)
       => new _RandomAccessFileOpsImpl(pointer);
 }
 
 
 class _RandomAccessFileOpsImpl extends NativeFieldWrapperClass1
                                implements _RandomAccessFileOps {
   _RandomAccessFileOpsImpl._();
 
   factory _RandomAccessFileOpsImpl(int pointer)
       => new _RandomAccessFileOpsImpl._().._setPointer(pointer);
@@ skipping 30 matching lines @@
   static final Map<int, _WatcherPath> _idMap = {};
 
   final String _path;
   final int _events;
   final bool _recursive;
 
   _WatcherPath _watcherPath;
 
   StreamController _broadcastController;
 
-  /* @patch */ static Stream<FileSystemEvent> _watch(
+  @patch static Stream<FileSystemEvent> _watch(
       String path, int events, bool recursive) {
     if (Platform.isLinux) {
       return new _InotifyFileSystemWatcher(path, events, recursive).stream;
     }
     if (Platform.isWindows) {
       return new _Win32FileSystemWatcher(path, events, recursive).stream;
     }
     if (Platform.isMacOS) {
       return new _FSEventStreamFileSystemWatcher(
           path, events, recursive).stream;
@@ skipping 167 matching lines @@
       } else if (event == RawSocketEvent.CLOSED) {
       } else if (event == RawSocketEvent.READ_CLOSED) {
       } else {
         assert(false);
       }
       events.addAll(stops);
       return events;
     });
   }
 
-  /* @patch */ static bool get isSupported
+  @patch static bool get isSupported
       native "FileSystemWatcher_IsSupported";
 
   static int _initWatcher() native "FileSystemWatcher_InitWatcher";
   static void _closeWatcher(int id) native "FileSystemWatcher_CloseWatcher";
 
   static int _watchPath(int id, String path, int events, bool recursive)
       native "FileSystemWatcher_WatchPath";
   static void _unwatchPath(int id, int path_id)
       native "FileSystemWatcher_UnwatchPath";
   static List _readEvents(int id, int path_id)
@@ skipping 99 matching lines @@
   void _pathWatchedEnd() {
     _subscription.cancel();
     _controller.close();
   }
 }
 
 
 Uint8List _makeUint8ListView(Uint8List source, int offsetInBytes, int length) {
   return new Uint8List.view(source.buffer, offsetInBytes, length);
 }