[dart:io][windows] Make unicode characters display correctly.

runtime/bin/file_macos.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_MACOS)
 
 #include "bin/file.h"
 
 #include <copyfile.h>  // NOLINT
@@ skipping 116 matching lines @@
   return lseek(handle_->fd(), 0, SEEK_CUR);
 }
 
 
 bool File::SetPosition(int64_t position) {
   ASSERT(handle_->fd() >= 0);
   return lseek(handle_->fd(), position, SEEK_SET) >= 0;
 }
 
 
+// There is no difference between binary and text translation modes on this
+// platform, so this operation is a no-op.
+void File::SetTranslation(DartFileTranslation translation) {}
+
+
 bool File::Truncate(int64_t length) {
   ASSERT(handle_->fd() >= 0);
   return TEMP_FAILURE_RETRY(ftruncate(handle_->fd(), length)) != -1;
 }
 
 
 bool File::Flush() {
   ASSERT(handle_->fd() >= 0);
   return NO_RETRY_EXPECTED(fsync(handle_->fd())) != -1;
 }
@@ skipping 404 matching lines @@
   return ((file_1_info.st_ino == file_2_info.st_ino) &&
           (file_1_info.st_dev == file_2_info.st_dev))
              ? File::kIdentical
              : File::kDifferent;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)