Cleanup: Remove unneeded forward declararations in net.

net/curvecp/received_block_list.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #ifndef NET_CURVECP_RECEIVED_BLOCK_LIST_H_
 #define NET_CURVECP_RECEIVED_BLOCK_LIST_H_
 #pragma once
 
 #include <deque>
 
 #include "base/memory/ref_counted.h"
 
 namespace net {
 
 class DrainableIOBuffer;
 class IOBuffer;
-class IOBufferWithSize;
 
 // A ReceivedBlockList manages everything needed to track a set of of incoming
 // blocks.  It can coalesce continuous blocks and locate holes in the received
 // data.
 // Note:  this list does not expect to receive overlapping blocks such as:
 //        Block 1: bytes 10-20
 //        Block 2: bytes 15-25
 class ReceivedBlockList {
  public:
   ReceivedBlockList();
@@ skipping 34 matching lines @@
   int64 current_position_;
   int64 bytes_received_;
   BlockList list_;
 
   DISALLOW_COPY_AND_ASSIGN(ReceivedBlockList);
 };
 
 }  // namespace net
 
 #endif  // NET_CURVECP_RECEIVED_BLOCK_LIST_H_