Remove _BufferList from dart:io and now use BytesBuilder.

sdk/lib/io/bytes_builder.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;
 
 /**
  * Builds a list of bytes, allowing bytes and lists of bytes to be added at the
  * end.
  *
@@ skipping 48 matching lines @@
 
   /**
    * Returns the contents of `this` and clears `this`.
    *
    * The list returned is a view of the the internal buffer, limited to the
    * [length].
    */
   List<int> takeBytes() {
     if (_buffer == null) return new Uint8List(0);
     var buffer = _buffer;
+    int length = _length;
     clear();
-    return new Uint8List.view(buffer.buffer, 0, _length);
+    return new Uint8List.view(buffer.buffer, 0, length);

[Bill Hesse, 2013/07/12 10:23:25]

Very funny bug!

   }
 
   /**
    * Returns a copy of the current contents of the builder.
    *
    * Leaves the contents of the builder intact.
    */
   List<int> toBytes() {
     if (_buffer == null) return new Uint8List(0);
     return new Uint8List.fromList(
@@ skipping 26 matching lines @@
   int _pow2roundup(int x) {
     --x;
     x |= x >> 1;
     x |= x >> 2;
     x |= x >> 4;
     x |= x >> 8;
     x |= x >> 16;
     return x + 1;
   }
 }