Make std* blocking file-descriptors.

runtime/bin/eventhandler_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/eventhandler.h"
 
 #include <winsock2.h>  // NOLINT
@@ skipping 697 matching lines @@
 
 void StdHandle::DoClose() {
   MonitorLocker locker(write_monitor_);
   if (write_thread_exists_) {
     write_thread_running_ = false;
     locker.Notify();
     while (write_thread_exists_) {
       locker.Wait(Monitor::kNoTimeout);
     }
   }
-  if (handle_ == GetStdHandle(STD_OUTPUT_HANDLE)) {
-    int fd = _open("NUL", _O_WRONLY);
-    ASSERT(fd >= 0);
-    _dup2(fd, _fileno(stdout));
-    close(fd);
-  } else {
-    Handle::DoClose();
-  }
+  Handle::DoClose();
 }
 
 
 bool ClientSocket::LoadDisconnectEx() {
   // Load the DisconnectEx function into memory using WSAIoctl.
   GUID guid_disconnect_ex = WSAID_DISCONNECTEX;
   DWORD bytes;
   int status = WSAIoctl(socket(),
                         SIO_GET_EXTENSION_FUNCTION_POINTER,
                         &guid_disconnect_ex,
@@ skipping 573 matching lines @@
 
 
 void EventHandlerImplementation::Shutdown() {
   SendData(kShutdownId, 0, 0);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)