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

runtime/bin/file.h

 // 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.
 
 #ifndef RUNTIME_BIN_FILE_H_
 #define RUNTIME_BIN_FILE_H_
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 42 matching lines @@
   // FileMode.READ, FileMode.WRITE, FileMode.APPEND,
   // FileMode.WRITE_ONLY and FileMode.WRITE_ONLY_APPEND in file.dart.
   enum DartFileOpenMode {
     kDartRead = 0,
     kDartWrite = 1,
     kDartAppend = 2,
     kDartWriteOnly = 3,
     kDartWriteOnlyAppend = 4
   };
 
+  // These values have to be kept in sync with the values of
+  // _FileTranslation.text and _FileTranslation.binary in file_impl.dart
+  enum DartFileTranslation {
+    kText = 0,
+    kBinary = 1,
+  };
+
   enum Type { kIsFile = 0, kIsDirectory = 1, kIsLink = 2, kDoesNotExist = 3 };
 
   enum Identical { kIdentical = 0, kDifferent = 1, kError = 2 };
 
   enum StdioHandleType {
     kTerminal = 0,
     kPipe = 1,
     kFile = 2,
     kSocket = 3,
     kOther = 4
@@ skipping 46 matching lines @@
   // be determined (e.g. not seekable device).
   int64_t Length();
 
   // Get the current position in the file.
   // Returns a negative value if position cannot be determined.
   int64_t Position();
 
   // Set the byte position in the file.
   bool SetPosition(int64_t position);
 
+  // Set the translation mode of the file. This is currently a no-op unless the
+  // file is for a terminal on Windows.
+  void SetTranslation(DartFileTranslation translation);
+
   // Truncate (or extend) the file to the given length in bytes.
   bool Truncate(int64_t length);
 
   // Flush contents of file.
   bool Flush();
 
   // Lock range of a file.
   bool Lock(LockType lock, int64_t start, int64_t end);
 
   // Returns whether the file has been closed.
@@ skipping 108 matching lines @@
   Dart_WeakPersistentHandle weak_handle_;
 
   friend class ReferenceCounted<File>;
   DISALLOW_COPY_AND_ASSIGN(File);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_FILE_H_