Remove IPC::Channel::set_listener().

ipc/ipc_channel_nacl.cc

 // 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.
 
 #include "ipc/ipc_channel_nacl.h"
 
 #include <errno.h>
 #include <stddef.h>
 #include <sys/nacl_imc_api.h>
 #include <sys/nacl_syscalls.h>
@@ skipping 351 matching lines @@
 }
 
 bool Channel::Connect() {
   return channel_impl_->Connect();
 }
 
 void Channel::Close() {
   channel_impl_->Close();
 }
 
-void Channel::set_listener(Listener* listener) {
-  channel_impl_->set_listener(listener);
-}
-
 base::ProcessId Channel::peer_pid() const {
   // This shouldn't actually get used in the untrusted side of the proxy, and we
   // don't have the real pid anyway.
   return -1;
 }
 
 bool Channel::Send(Message* message) {
   return channel_impl_->Send(message);
 }
 
 }  // namespace IPC