Revert "Better error-message when bind fails."

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.
 
 #if !defined(DART_IO_DISABLED)
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/socket.h"
@@ skipping 232 matching lines @@
                                    const RawAddr& source_addr) {
   intptr_t fd = Create(addr);
   if (fd < 0) {
     return fd;
   }
 
   return Connect(fd, addr, source_addr);
 }
 
 
-bool Socket::IsBindError(intptr_t error_number) {
-  return error_number == WSAEADDRINUSE || error_number == WSAEADDRNOTAVAIL ||
-      error_number == WSAEINVAL;
-}
-
-
 void Socket::GetError(intptr_t fd, OSError* os_error) {
   Handle* handle = reinterpret_cast<Handle*>(fd);
   os_error->SetCodeAndMessage(OSError::kSystem, handle->last_error());
 }
 
 
 int Socket::GetType(intptr_t fd) {
   Handle* handle = reinterpret_cast<Handle*>(fd);
   switch (GetFileType(handle->handle())) {
     case FILE_TYPE_CHAR: return File::kTerminal;
@@ skipping 451 matching lines @@
                     reinterpret_cast<char *>(&mreq),
                     sizeof(mreq)) == 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)
 
 #endif  // !defined(DART_IO_DISABLED)