Add FileSystemWatcher class to dart:io.

runtime/bin/io_natives.cc

 // 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.
 
 #include "bin/io_natives.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "bin/builtin.h"
@@ skipping 50 matching lines @@
   V(Socket_Available, 1)                                                       \
   V(Socket_Read, 2)                                                            \
   V(Socket_WriteList, 4)                                                       \
   V(Socket_GetPort, 1)                                                         \
   V(Socket_GetRemotePeer, 1)                                                   \
   V(Socket_GetError, 1)                                                        \
   V(Socket_GetStdioHandle, 2)                                                  \
   V(Socket_NewServicePort, 0)                                                  \
   V(Socket_GetType, 1)                                                         \
   V(Socket_SetOption, 3)                                                       \
+  V(Socket_SetSocketId, 2)                                                     \
   V(Stdin_ReadByte, 1)                                                         \
   V(Stdin_SetEchoMode, 2)                                                      \
   V(Stdin_SetLineMode, 2)                                                      \
   V(StringToSystemEncoding, 1)                                                 \
   V(SystemEncodingToString, 1)
 
 
 IO_NATIVE_LIST(DECLARE_FUNCTION);
 
 static struct NativeEntries {
@@ skipping 17 matching lines @@
     if (!strcmp(function_name, entry->name_) &&
         (entry->argument_count_ == argument_count)) {
       return reinterpret_cast<Dart_NativeFunction>(entry->function_);
     }
   }
   return NULL;
 }
 
 }  // namespace bin
 }  // namespace dart