Add pipe to input stream

runtime/bin/file.dart

 // Copyright (c) 2011, 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.
 
 interface File factory _File {
   /**
    * Create a File object.
    */
   File(String name);
 
@@ skipping 203 matching lines @@
    */
   void truncateSync(int length);
 
   /**
    * Get the length of the file. When the operation completes the
    * [lengthHandler] is called with the length.
    */
   void length();
 
   /**
-   * Get the length of the file. When the operation completes the
-   * [lengthHandler] is called with the length.
+   * Synchronously get the length of the file.
    */
   int lengthSync();
 
   /**
    * Flush the contents of the file to disk. The [flushHandler] is
    * called when the flush operation completes.
    */
    void flush();
 
   /**
@@ skipping 26 matching lines @@
 
 interface FileOutputStream extends OutputStream {
 }
 
 
 class FileIOException implements Exception {
   const FileIOException([String this.message = ""]);
   String toString() => "FileIOException: $message";
   final String message;
 }