Remove duplicated code on Windows

runtime/bin/process_win.cc

 // 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include <process.h>  // NOLINT
 
 #include "bin/builtin.h"
 #include "bin/process.h"
 #include "bin/eventhandler.h"
 #include "bin/log.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
+#include "bin/utils_win.h"
 
 
 namespace dart {
 namespace bin {
 
 static const int kReadHandle = 0;
 static const int kWriteHandle = 1;
 
 
 // ProcessInfo is used to map a process id to the process handle,
@@ skipping 272 matching lines @@
   CloseProcessPipe(handles2);
   CloseProcessPipe(handles3);
   CloseProcessPipe(handles4);
 }
 
 
 static int SetOsErrorMessage(char** os_error_message) {
   int error_code = GetLastError();
   static const int kMaxMessageLength = 256;
   wchar_t message[kMaxMessageLength];
-  DWORD message_size =
-      FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
-                     NULL,
-                     error_code,
-                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                     message,
-                     kMaxMessageLength,
-                     NULL);
-  if (message_size == 0) {
-    if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
-      Log::PrintErr("FormatMessage failed %d\n", GetLastError());
-    }
-    _snwprintf(message, kMaxMessageLength, L"OS Error %d", error_code);
-  }
-  message[kMaxMessageLength - 1] = '\0';
+  FormatMessageIntoBuffer(error_code, message, kMaxMessageLength);
   *os_error_message = StringUtils::WideToUtf8(message);
   return error_code;
 }
 
 
 typedef BOOL (WINAPI *InitProcThreadAttrListFn)(
     LPPROC_THREAD_ATTRIBUTE_LIST, DWORD, DWORD, PSIZE_T);
 
 typedef BOOL (WINAPI *UpdateProcThreadAttrFn)(
     LPPROC_THREAD_ATTRIBUTE_LIST, DWORD, DWORD_PTR,
@@ skipping 526 matching lines @@
 
 
 intptr_t Process::CurrentProcessId() {
   return static_cast<intptr_t>(GetCurrentProcessId());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)