ipc: Remove ipc_listener.h from ipc_channel.h and update the files.

chrome/nacl/nacl_broker_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_BROKER_LISTENER_H_
 #define CHROME_NACL_NACL_BROKER_LISTENER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "chrome/common/nacl_types.h"
-#include "ipc/ipc_channel.h"
+#include "ipc/ipc_listener.h"
+
+namespace IPC {
+class Channel;
+}
 
 // The BrokerThread class represents the thread that handles the messages from
 // the browser process and starts NaCl loader processes.
 class NaClBrokerListener : public IPC::Listener {
  public:
   NaClBrokerListener();
   ~NaClBrokerListener();
 
   void Listen();
 
   // IPC::Listener implementation.
   virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
   virtual void OnChannelError() OVERRIDE;
 
  private:
   void OnLaunchLoaderThroughBroker(const std::string& loader_channel_id);
   void OnLaunchDebugExceptionHandler(int32 pid,
                                      base::ProcessHandle process_handle,
                                      const std::string& startup_info);
   void OnStopBroker();
 
   base::ProcessHandle browser_handle_;
   scoped_ptr<IPC::Channel> channel_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClBrokerListener);
 };
 
 #endif  // CHROME_NACL_NACL_BROKER_LISTENER_H_