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

trunk/src/net/spdy/spdy_buffer.cc

-// 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.
-
-#include "net/spdy/spdy_buffer.h"
-
-#include <cstring>
-
-#include "base/logging.h"
-#include "net/base/io_buffer.h"
-#include "net/spdy/spdy_protocol.h"
-
-namespace net {
-
-namespace {
-
-// Makes a SpdyFrame with |size| bytes of data copied from
-// |data|. |data| must be non-NULL and |size| must be positive.
-scoped_ptr<SpdyFrame> MakeSpdyFrame(const char* data, size_t size) {
-  DCHECK(data);
-  DCHECK_GT(size, 0u);
-  scoped_array<char> frame_data(new char[size]);
-  std::memcpy(frame_data.get(), data, size);
-  scoped_ptr<SpdyFrame> frame(
-      new SpdyFrame(frame_data.release(), size, true /* owns_buffer */));
-  return frame.Pass();
-}
-
-}  // namespace
-
-SpdyBuffer::SpdyBuffer(scoped_ptr<SpdyFrame> frame)
-    : frame_(frame.Pass()),
-      offset_(0) {}
-
-// The given data may not be strictly a SPDY frame; we (ab)use
-// |frame_| just as a container.
-SpdyBuffer::SpdyBuffer(const char* data, size_t size) :
-    frame_(MakeSpdyFrame(data, size)),
-    offset_(0) {}
-
-SpdyBuffer::~SpdyBuffer() {}
-
-const char* SpdyBuffer::GetRemainingData() const {
-  return frame_->data() + offset_;
-}
-
-size_t SpdyBuffer::GetRemainingSize() const {
-  return frame_->size() - offset_;
-}
-
-void SpdyBuffer::Consume(size_t consume_size) {
-  DCHECK_GE(consume_size, 1u);
-  DCHECK_LE(consume_size, GetRemainingSize());
-  offset_ += consume_size;
-};
-
-IOBuffer* SpdyBuffer::GetIOBufferForRemainingData() {
-  return new WrappedIOBuffer(GetRemainingData());
-}
-
-}  // namespace net