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

runtime/bin/directory_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 _Directory implements Directory {
   static const CREATE_REQUEST = 0;
   static const DELETE_REQUEST = 1;
   static const EXISTS_REQUEST = 2;
   static const CREATE_TEMP_REQUEST = 3;
@@ skipping 151 matching lines @@
     if (_path is !String || newPath is !String) {
       throw new ArgumentError();
     }
     var result = _rename(_path, newPath);
     if (result is OSError) {
       throw new DirectoryIOException("Rename failed", _path, result);
     }
     return new Directory(newPath);
   }
 
-  DirectoryLister list([bool recursive = false]) {
+  DirectoryLister list({bool recursive: false}) {
     return new _DirectoryLister(_path, recursive);
   }
 
   String get path { return _path; }
 
   bool _isErrorResponse(response) {
     return response is List && response[0] != _SUCCESS_RESPONSE;
   }
 
   Exception _exceptionFromResponse(response, String message) {
@@ skipping 102 matching lines @@
     } else {
       throw e;
     }
   }
 
   Function _onDir;
   Function _onFile;
   Function _onDone;
   Function _onError;
 }