linux (and some posix): multiprocess plugins compiling.

chrome/common/ipc_channel_posix.cc

 // Copyright (c) 2008 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 "chrome/common/ipc_channel_posix.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <sys/types.h>
@@ skipping 640 matching lines @@
     if (!is_blocked_on_write_) {
       if (!ProcessOutgoingMessages())
         return false;
     }
   }
 
   return true;
 }
 
 void Channel::ChannelImpl::GetClientFileDescriptorMapping(int *src_fd,
-                                                          int *dest_fd) {
+                                                          int *dest_fd) const {
   DCHECK(mode_ == MODE_SERVER);
   *src_fd = client_pipe_;
   *dest_fd = kClientChannelFd;
 }
 
 void Channel::ChannelImpl::OnClientConnected() {
   // WARNING: this isn't actually called when a client connects.
   DCHECK(mode_ == MODE_SERVER);
 }
 
@@ skipping 113 matching lines @@
 }
 
 void Channel::set_listener(Listener* listener) {
   channel_impl_->set_listener(listener);
 }
 
 bool Channel::Send(Message* message) {
   return channel_impl_->Send(message);
 }
 
-void Channel::GetClientFileDescriptorMapping(int *src_fd, int *dest_fd) {
+void Channel::GetClientFileDescriptorMapping(int *src_fd, int *dest_fd) const {
   return channel_impl_->GetClientFileDescriptorMapping(src_fd, dest_fd);
 }
 
 void Channel::OnClientConnected() {
   return channel_impl_->OnClientConnected();
 }
 
 
 }  // namespace IPC