Add an IPC channel between the NaCl loader process and the renderer.

chrome/nacl/nacl_listener.h

 // Copyright (c) 2012 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 CHROME_NACL_NACL_LISTENER_H_
 #define CHROME_NACL_NACL_LISTENER_H_
 #pragma once
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "chrome/common/nacl_types.h"
 #include "ipc/ipc_channel.h"
 
 namespace IPC {
 class SyncChannel;
 class SyncMessageFilter;
 }
 
+struct NaClDesc;
+
 // The NaClListener is an IPC channel listener that waits for a
 // request to start a NaCl module.
 class NaClListener : public IPC::Channel::Listener {
  public:
   NaClListener();
   virtual ~NaClListener();
   // Listen for a request to launch a NaCl module.
   void Listen();
   void set_debug_enabled(bool value) {debug_enabled_ = value;}
 
   bool Send(IPC::Message* msg);
 
  private:
   void OnMsgStart(const nacl::NaClStartParams& params);
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   // A channel back to the browser.
   scoped_ptr<IPC::SyncChannel> channel_;
 
   // A filter that allows other threads to use the channel.
   scoped_refptr<IPC::SyncMessageFilter> filter_;
 
   base::WaitableEvent shutdown_event_;
   base::Thread io_thread_;
 
   // Used to identify what thread we're on.
   MessageLoop* main_loop_;
 
+  NaClDesc* nacl_ppapi_channel_;
+
   bool debug_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClListener);
 };
 
 #endif  // CHROME_NACL_NACL_LISTENER_H_