Split dart:builtin into dart:builtin and dart:io.

runtime/bin/buffer_list.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.
 
+#library("io");

[Ivan Posva, 2012/01/21 20:24:55]

It would be nice to pull this out into its own file and make sure it is listed
first in the gypi, with an appropriate comment.

Also this library makes use of "dart:nativewrappers" and "dart:coreimpl", so
that should be properly imported here. See builtin.dart for example.

[Mads Ager (google), 2012/01/23 11:35:38]

Restored the imports of coreimpl and nativewrappers. Extracted a io.dart file
which needs to be listed first in the gypi. Thanks!

+
 /**
  * Utility class that holds a number of byte buffers and can deliver
  * the bytes either one by one or in chunks.
  */
 class _BufferList {
   _BufferList() {
     clear();
   }
 
   /**
@@ skipping 124 matching lines @@
   void clear() {
     _index = 0;
     _length = 0;
     _buffers = new Queue();
   }
 
   int _length;  // Total number of bytes remaining in the buffers.
   Queue<List<int>> _buffers;  // List of data buffers.
   int _index;  // Index of the next byte in the first buffer.
 }