[SPDY] Replace SpdyIOBuffer with new SpdyBuffer class

net/spdy/spdy_frame_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_FRAME_PRODUCER_H_
-#define NET_SPDY_SPDY_FRAME_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 SpdyFrame;
-
-// An object which provides a SpdyFrame for writing. We pass these
-// around instead of SpdyFrames since some frames have to be generated
-// "just in time".
-class NET_EXPORT_PRIVATE SpdyFrameProducer {
- public:
-  SpdyFrameProducer();
-
-  // Produces the frame to be written. Will be called at most once.
-  virtual scoped_ptr<SpdyFrame> ProduceFrame() = 0;
-
-  virtual ~SpdyFrameProducer();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SpdyFrameProducer);
-};
-
-// A simple wrapper around a single SpdyFrame.
-class NET_EXPORT_PRIVATE SimpleFrameProducer : public SpdyFrameProducer {
- public:
-  explicit SimpleFrameProducer(scoped_ptr<SpdyFrame> frame);
-
-  virtual ~SimpleFrameProducer();
-
-  virtual scoped_ptr<SpdyFrame> ProduceFrame() OVERRIDE;
-
- private:
-  scoped_ptr<SpdyFrame> frame_;
-
-  DISALLOW_COPY_AND_ASSIGN(SimpleFrameProducer);
-};
-
-}  // namespace net
-
-#endif  // NET_SPDY_SPDY_FRAME_PRODUCER_H_