Revert of Make WebURLLoader capable of retaining received buffers.

content/child/shared_memory_received_data_factory.h

Index: content/child/shared_memory_received_data_factory.h
diff --git a/content/child/shared_memory_received_data_factory.h b/content/child/shared_memory_received_data_factory.h
deleted file mode 100644
index 3da0926c14c3494210b867b7490573af00411061..0000000000000000000000000000000000000000
--- a/content/child/shared_memory_received_data_factory.h
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright 2015 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 CONTENT_CHILD_SHARED_MEMORY_RECEIVED_DATA_FACTORY_H_
-#define CONTENT_CHILD_SHARED_MEMORY_RECEIVED_DATA_FACTORY_H_
-
-#include <vector>
-
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/shared_memory.h"
-#include "content/common/content_export.h"
-#include "content/public/child/request_peer.h"
-
-namespace IPC {
-class Sender;
-}  // namespace IPC
-
-namespace content {
-
-class CONTENT_EXPORT SharedMemoryReceivedDataFactory final
-    : public base::RefCounted<SharedMemoryReceivedDataFactory> {
- public:
-  SharedMemoryReceivedDataFactory(IPC::Sender* message_sender,
-                                  int request_id,
-                                  linked_ptr<base::SharedMemory> memory);
-
-  scoped_ptr<RequestPeer::ReceivedData> Create(int offset,
-                                               int length,
-                                               int encoded_length);
-
-  // Stops this factory. After calling this function, releasing issued data
-  // won't send ack signal to the browser process.
-  void Stop();
-
- private:
-  // Here TicketId is uint32_t, but a factory may issue more data by reusing id.
-  using TicketId = uint32_t;
-
-  class SharedMemoryReceivedData;
-  // Called by SharedMemoryReceivedData.
-  void Reclaim(TicketId id);
-
-  class TicketComparator;
-  friend class base::RefCounted<SharedMemoryReceivedDataFactory>;
-  ~SharedMemoryReceivedDataFactory();
-
-  void SendAck(size_t count);
-
-  TicketId id_;
-  TicketId oldest_;
-  std::vector<TicketId> released_tickets_;
-  // We assume that |message_sender_| is valid until |Stop| is called.
-  IPC::Sender* message_sender_;
-  int request_id_;
-  bool is_stopped_;
-  // Just to keep the payload alive while issued data is alive.
-  linked_ptr<base::SharedMemory> memory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SharedMemoryReceivedDataFactory);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_SHARED_MEMORY_RECEIVED_DATA_FACTORY_H_