[dart:io][windows] Use WriteFile instead of _write

sdk/lib/io/stdio.dart

Index: sdk/lib/io/stdio.dart
diff --git a/sdk/lib/io/stdio.dart b/sdk/lib/io/stdio.dart
index 8f1c6256dccb045ebeabd949205f05421b1dd09e..7bc5bd677b94ec2eb8161324e3c6e7d234e8fce3 100644
--- a/sdk/lib/io/stdio.dart
+++ b/sdk/lib/io/stdio.dart
@@ -183,7 +183,7 @@ class Stdin extends _StdStream implements Stream<List<int>> {
  * This class can also be used to check whether `stdout` or `stderr` is
  * connected to a terminal and query some terminal properties.
  */
-class Stdout extends _StdFileSink implements IOSink {
+class Stdout extends _StdSink implements IOSink {
   final int _fd;
   IOSink _nonBlocking;
 
@@ -300,42 +300,30 @@ class _StdConsumer implements StreamConsumer<List<int>> {
   }
 }
 
-class _StdSinkHelper implements IOSink {
+class _StdSink implements IOSink {
   final IOSink _sink;
   final bool _isTranslatable;
 
-  _StdSinkHelper(this._sink, this._isTranslatable);
+  _StdSink(this._sink);
 
   Encoding get encoding => _sink.encoding;
   void set encoding(Encoding encoding) {
     _sink.encoding = encoding;
   }
 
-  void set _translation(_FileTranslation t) {
-    if (_isTranslatable) {
-      _IOSinkImpl sink = _sink;
-      _StdConsumer target = sink._target;
-      target._file.translation = t;
-    }
-  }
-
   void write(object) {
-    _translation = _FileTranslation.text;
     _sink.write(object);
   }
 
   void writeln([object = ""]) {
-    _translation = _FileTranslation.text;
     _sink.writeln(object);
   }
 
   void writeAll(objects, [sep = ""]) {
-    _translation = _FileTranslation.text;
     _sink.writeAll(objects, sep);
   }
 
   void add(List<int> data) {
-    _translation = _FileTranslation.binary;
     _sink.add(data);
   }
 
@@ -344,29 +332,15 @@ class _StdSinkHelper implements IOSink {
   }
 
   void writeCharCode(int charCode) {
-    _translation = _FileTranslation.text;
     _sink.writeCharCode(charCode);
   }
 
-  Future addStream(Stream<List<int>> stream) {
-    _translation = _FileTranslation.binary;
-    return _sink.addStream(stream);
-  }
-
+  Future addStream(Stream<List<int>> stream) => _sink.addStream(stream);
   Future flush() => _sink.flush();
   Future close() => _sink.close();
   Future get done => _sink.done;
 }
 
-class _StdFileSink extends _StdSinkHelper {
-  // The target of `sink` is expected to be a _StdConsumer.
-  _StdFileSink(IOSink sink) : super(sink, true);
-}
-
-class _StdSocketSink extends _StdSinkHelper {
-  _StdSocketSink(IOSink sink) : super(sink, false);
-}
-
 /// The type of object a standard IO stream is attached to.
 class StdioType {
   static const StdioType TERMINAL = const StdioType._("terminal");