Remove StreamSink(replaced by EventSink) and make IOSink extend EventSink.

sdk/lib/io/file_impl.dart

 // 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.
 
 part of dart.io;
 
 // Read the file in blocks of size 64k.
 const int _BLOCK_SIZE = 64 * 1024;
 
 
@@ skipping 539 matching lines @@
   }
 
   List<String> readAsLinesSync({Encoding encoding: Encoding.UTF_8}) {
     return _decodeLines(readAsBytesSync(), encoding);
   }
 
   Future<File> writeAsBytes(List<int> bytes,
                             {FileMode mode: FileMode.WRITE}) {
     try {
       IOSink<File> sink = openWrite(mode: mode);
-      sink.writeBytes(bytes);
+      sink.add(bytes);
       sink.close();
       return sink.done.then((_) => this);;
     } catch (e) {
       return new Future.immediateError(e);
     }
   }
 
   void writeAsBytesSync(List<int> bytes, {FileMode mode: FileMode.WRITE}) {
     RandomAccessFile opened = openSync(mode: mode);
     opened.writeListSync(bytes, 0, bytes.length);
@@ skipping 483 matching lines @@
           new FileIOException("File closed '$_path'"));
     });
     return completer.future;
   }
 
   final String _path;
   int _id;
 
   SendPort _fileService;
 }