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

trunk/src/net/spdy/spdy_read_queue.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_read_queue.h"
-
-#include "base/logging.h"
-#include "base/stl_util.h"
-#include "net/spdy/spdy_buffer.h"
-
-namespace net {
-
-SpdyReadQueue::SpdyReadQueue() : total_size_(0) {}
-
-SpdyReadQueue::~SpdyReadQueue() {
-  Clear();
-}
-
-bool SpdyReadQueue::IsEmpty() const {
-  DCHECK_EQ(queue_.empty(), total_size_ == 0);
-  return queue_.empty();
-}
-
-size_t SpdyReadQueue::GetTotalSize() const {
-  return total_size_;
-}
-
-void SpdyReadQueue::Enqueue(scoped_ptr<SpdyBuffer> buffer) {
-  DCHECK_GT(buffer->GetRemainingSize(), 0u);
-  total_size_ += buffer->GetRemainingSize();
-  queue_.push_back(buffer.release());
-}
-
-size_t SpdyReadQueue::Dequeue(char* out, size_t len) {
-  DCHECK_GT(len, 0u);
-  size_t bytes_copied = 0;
-  while (!queue_.empty() && bytes_copied < len) {
-    SpdyBuffer* buffer = queue_.front();
-    size_t bytes_to_copy =
-        std::min(len - bytes_copied, buffer->GetRemainingSize());
-    memcpy(out + bytes_copied, buffer->GetRemainingData(), bytes_to_copy);
-    bytes_copied += bytes_to_copy;
-    if (bytes_to_copy == buffer->GetRemainingSize()) {
-      delete queue_.front();
-      queue_.pop_front();
-    } else {
-      buffer->Consume(bytes_to_copy);
-    }
-  }
-  total_size_ -= bytes_copied;
-  return bytes_copied;
-}
-
-void SpdyReadQueue::Clear() {
-  STLDeleteElements(&queue_);
-  queue_.clear();
-}
-
-}  // namespace