Add FileSystemWatcher class to dart:io.

runtime/bin/socket_win.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 "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/builtin.h"
 #include "bin/eventhandler.h"
 #include "bin/file.h"
@@ skipping 163 matching lines @@
   Handle* handle = reinterpret_cast<Handle*>(fd);
   switch (GetFileType(handle->handle())) {
     case FILE_TYPE_CHAR: return File::kTerminal;
     case FILE_TYPE_PIPE: return File::kPipe;
     case FILE_TYPE_DISK: return File::kFile;
     default: return GetLastError == NO_ERROR ? File::kOther : -1;
   }
 }
 
 
-intptr_t Socket::GetStdioHandle(int num) {
+intptr_t Socket::GetStdioHandle(intptr_t num) {
   HANDLE handle;
   switch (num) {
     case 0:
       handle = GetStdHandle(STD_INPUT_HANDLE);
       break;
     case 1:
       handle = GetStdHandle(STD_OUTPUT_HANDLE);
       break;
     case 2:
       handle = GetStdHandle(STD_ERROR_HANDLE);
@@ skipping 243 matching lines @@
                     IPPROTO_TCP,
                     TCP_NODELAY,
                     reinterpret_cast<char *>(&on),
                     sizeof(on)) == 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)