Remove second generic argument of StreamConsumer.

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 129 matching lines @@
 
   void _onPauseStateChange() {
     if (_controller.isPaused) {
       _paused = true;
     } else {
       _resume();
     }
   }
 }
 
-class _FileStreamConsumer extends StreamConsumer<List<int>, File> {
+class _FileStreamConsumer extends StreamConsumer<List<int>> {
   File _file;
   Future<RandomAccessFile> _openFuture;
   StreamSubscription _subscription;
 
   _FileStreamConsumer(File this._file, FileMode mode) {
     _openFuture = _file.open(mode: mode);
   }
 
   _FileStreamConsumer.fromStdio(int fd) {
     assert(1 <= fd && fd <= 2);
@@ skipping 893 matching lines @@
           new FileIOException("File closed '$_path'"));
     });
     return completer.future;
   }
 
   final String _path;
   int _id;
 
   SendPort _fileService;
 }