ipc: Create AttachmentBrokerPrivileged and AttachmentBrokerUnprivileged.

ipc/attachment_broker_win.h

-// 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 IPC_ATTACHMENT_BROKER_WIN_H_
-#define IPC_ATTACHMENT_BROKER_WIN_H_
-
-#include <vector>
-
-#include "base/memory/ref_counted.h"
-#include "ipc/attachment_broker.h"
-#include "ipc/brokerable_attachment.h"
-#include "ipc/handle_attachment_win.h"
-#include "ipc/ipc_export.h"
-
-namespace IPC {
-
-class Sender;
-
-// This class is an implementation of AttachmentBroker for the Windows platform
-// for non-privileged processes.
-class IPC_EXPORT AttachmentBrokerWin : public IPC::AttachmentBroker {
- public:
-  AttachmentBrokerWin();
-  ~AttachmentBrokerWin() override;
-
-  // IPC::AttachmentBroker overrides.
-  bool SendAttachmentToProcess(const BrokerableAttachment* attachment,
-                               base::ProcessId destination_process) override;
-
-  // IPC::Listener overrides.
-  bool OnMessageReceived(const Message& message) override;
-
-  // |sender_| is used to send Messages to the broker. |sender_| must live at
-  // least as long as this instance.
-  void set_sender(IPC::Sender* sender) { sender_ = sender; }
-
- private:
-  // IPC message handlers.
-  void OnWinHandleHasBeenDuplicated(
-      const IPC::internal::HandleAttachmentWin::WireFormat& wire_format);
-
-  // |sender_| is used to send Messages to the broker. |sender_| must live at
-  // least as long as this instance.
-  IPC::Sender* sender_;
-  DISALLOW_COPY_AND_ASSIGN(AttachmentBrokerWin);
-};
-
-}  // namespace IPC
-
-#endif  // IPC_ATTACHMENT_BROKER_WIN_H_