Prepare the HTTP library for inclusion in the standalone VM (step 2)

runtime/bin/buffer_list.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.
 
 /**
  * Utility class that holds a number of byte buffers and can deliver
  * the bytes either one by one or in chunks.
  */
 class _BufferList {
   _BufferList() {
@@ skipping 56 matching lines @@
       _buffers.removeFirst();
       _index = 0;
       _length -= count;
       return result;
     } else {
       int firstRemaining = _buffers.first().length - _index;
       if (firstRemaining >= count) {
         result = _buffers.first().getRange(_index, count);
         _index += count;
         _length -= count;
+        if (_index == _buffers.first().length) {
+          _buffers.removeFirst();
+          _index = 0;
+        }
         return result;
       } else {
         result = new ByteArray(count);
         int remaining = count;
         while (remaining > 0) {
           int bytesInFirst = _buffers.first().length - _index;
           if (bytesInFirst <= remaining) {
             result.setRange(count - remaining,
                             bytesInFirst,
                             _buffers.first(),
@@ skipping 52 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.
 }