Change core lib, dart2js, and more for new optional parameters syntax

runtime/bin/file_impl.dart

 // 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.
 
 class _FileInputStream extends _BaseDataInputStream implements InputStream {
   _FileInputStream(String name)
       : _data = const [],
         _position = 0,
         _filePosition = 0 {
     var file = new File(name);
@@ skipping 81 matching lines @@
       _activeFillBufferCall = false;
       _reportError(e);
       return true;
     });
   }
 
   int available() {
     return closed ? 0 : _data.length - _position;
   }
 
-  void pipe(OutputStream output, [bool close = true]) {
+  void pipe(OutputStream output, {bool close: true}) {
     _pipe(this, output, close: close);
   }
 
   void _finishRead() {
     if (_position == _data.length && !_streamMarkedClosed) {
       _fillBuffer();
     } else {
       _checkScheduleCallbacks();
     }
   }
@@ skipping 973 matching lines @@
           new FileIOException("File closed '$_name'"));
     });
     return completer.future;
   }
 
   final String _name;
   int _id;
 
   SendPort _fileService;
 }