Clean up public interface of AttachmentBrokerUnprivileged.

components/nacl/broker/nacl_broker_listener.h

 // Copyright 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 COMPONENTS_NACL_BROKER_NACL_BROKER_LISTENER_H_
 #define COMPONENTS_NACL_BROKER_NACL_BROKER_LISTENER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process/process.h"
 #include "components/nacl/common/nacl_types.h"
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
 #include "ipc/ipc_listener.h"
 
 namespace IPC {
-class AttachmentBrokerUnprivileged;
 class Channel;
 }
 
 // The BrokerThread class represents the thread that handles the messages from
 // the browser process and starts NaCl loader processes.
 class NaClBrokerListener : public content::SandboxedProcessLauncherDelegate,
                            public IPC::Listener {
  public:
   NaClBrokerListener();
   ~NaClBrokerListener() override;
 
   void Listen();
 
   // content::SandboxedProcessLauncherDelegate implementation:
   bool PreSpawnTarget(sandbox::TargetPolicy* policy) override;
 
   // IPC::Listener implementation.
   void OnChannelConnected(int32_t peer_pid) override;
   bool OnMessageReceived(const IPC::Message& msg) override;
   void OnChannelError() override;
 
  private:
   void OnLaunchLoaderThroughBroker(const std::string& loader_channel_id);
   void OnLaunchDebugExceptionHandler(int32_t pid,
                                      base::ProcessHandle process_handle,
                                      const std::string& startup_info);
   void OnStopBroker();
 
   base::Process browser_process_;
-  scoped_ptr<IPC::AttachmentBrokerUnprivileged> attachment_broker_;
   scoped_ptr<IPC::Channel> channel_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClBrokerListener);
 };
 
 #endif  // COMPONENTS_NACL_BROKER_NACL_BROKER_LISTENER_H_