linux (and some posix): multiprocess plugins compiling.

chrome/common/ipc_channel.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_COMMON_IPC_CHANNEL_H_
 #define CHROME_COMMON_IPC_CHANNEL_H_
 
 #include "chrome/common/ipc_message.h"
 
 namespace IPC {
@@ skipping 76 matching lines @@
 
 #if defined(OS_POSIX)
   // On POSIX an IPC::Channel wraps a socketpair(), this method returns the
   // FD # for the client end of the socket and the equivalent FD# to use for
   // mapping it into the Child process.
   // This method may only be called on the server side of a channel.
   //
   // If the kTestingChannelID flag is specified on the command line then
   // a named FIFO is used as the channel transport mechanism rather than a
   // socketpair() in which case this method returns -1 for both parameters.
-  void GetClientFileDescriptorMapping(int *src_fd, int *dest_fd);
+  void GetClientFileDescriptorMapping(int *src_fd, int *dest_fd) const;
 
   // Call this method on the server side of the IPC Channel once a client is
   // connected in order to close the client side of the socketpair().
   void OnClientConnected();
 #endif  // defined(OS_POSIX)
 
  private:
   // PIMPL to which all channel calls are delegated.
   class ChannelImpl;
   ChannelImpl *channel_impl_;
 
   // The Hello message is internal to the Channel class.  It is sent
   // by the peer when the channel is connected.  The message contains
   // just the process id (pid).  The message has a special routing_id
   // (MSG_ROUTING_NONE) and type (HELLO_MESSAGE_TYPE).
   enum {
     HELLO_MESSAGE_TYPE = kuint16max  // Maximum value of message type (uint16),
                                      // to avoid conflicting with normal
                                      // message types, which are enumeration
                                      // constants starting from 0.
   };
 };
 
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_IPC_CHANNEL_H_