Revert 194560 "[SPDY] Replace SpdyIOBuffer with new SpdyBuffer c..."

trunk/src/net/spdy/spdy_buffer_producer.h

-// Copyright (c) 2013 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_SPDY_SPDY_BUFFER_PRODUCER_H_
-#define NET_SPDY_SPDY_BUFFER_PRODUCER_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-class SpdyBuffer;
-
-// An object which provides a SpdyBuffer for writing. We pass these
-// around instead of SpdyBuffers since some buffers have to be
-// generated "just in time".
-class NET_EXPORT_PRIVATE SpdyBufferProducer {
- public:
-  SpdyBufferProducer();
-
-  // Produces the buffer to be written. Will be called at most once.
-  virtual scoped_ptr<SpdyBuffer> ProduceBuffer() = 0;
-
-  virtual ~SpdyBufferProducer();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SpdyBufferProducer);
-};
-
-// A simple wrapper around a single SpdyBuffer.
-class NET_EXPORT_PRIVATE SimpleBufferProducer : public SpdyBufferProducer {
- public:
-  explicit SimpleBufferProducer(scoped_ptr<SpdyBuffer> buffer);
-
-  virtual ~SimpleBufferProducer();
-
-  virtual scoped_ptr<SpdyBuffer> ProduceBuffer() OVERRIDE;
-
- private:
-  scoped_ptr<SpdyBuffer> buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(SimpleBufferProducer);
-};
-
-}  // namespace net
-
-#endif  // NET_SPDY_SPDY_BUFFER_PRODUCER_H_