Create a message filter for message port messages. This allows a nice cleanu...

ipc/ipc_message.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 IPC_IPC_MESSAGE_H__
 #define IPC_IPC_MESSAGE_H__
 #pragma once
 
 #include <string>
 
@@ skipping 112 matching lines @@
   }
 
   int32 routing_id() const {
     return header()->routing;
   }
 
   void set_routing_id(int32 new_id) {
     header()->routing = new_id;
   }
 
-  template<class T>
-  static bool Dispatch(const Message* msg, T* obj, void (T::*func)()) {
+  template<class T, class S>
+  static bool Dispatch(const Message* msg, T* obj, S* sender,
+                       void (T::*func)()) {
     (obj->*func)();
     return true;
   }
 
-  template<class T>
-  static bool Dispatch(const Message* msg, T* obj, void (T::*func)() const) {
+  template<class T, class S>
+  static bool Dispatch(const Message* msg, T* obj, S* sender,
+                       void (T::*func)() const) {
     (obj->*func)();
     return true;
   }
 
-  template<class T>
-  static bool Dispatch(const Message* msg, T* obj,
+  template<class T, class S>
+  static bool Dispatch(const Message* msg, T* obj, S* sender,
                        void (T::*func)(const Message&)) {
     (obj->*func)(*msg);
     return true;
   }
 
-  template<class T>
-  static bool Dispatch(const Message* msg, T* obj,
+  template<class T, class S>
+  static bool Dispatch(const Message* msg, T* obj, S* sender,
                        void (T::*func)(const Message&) const) {
     (obj->*func)(*msg);
     return true;
   }
 
   // Used for async messages with no parameters.
   static void Log(std::string* name, const Message* msg, std::string* l) {
   }
 
   // Find the end of the message data that starts at range_start.  Returns NULL
@@ skipping 108 matching lines @@
   MSG_ROUTING_NONE = -2,
 
   // indicates a general message not sent to a particular tab.
   MSG_ROUTING_CONTROL = kint32max,
 };
 
 #define IPC_REPLY_ID 0xFFFFFFF0  // Special message id for replies
 #define IPC_LOGGING_ID 0xFFFFFFF1  // Special message id for logging
 
 #endif  // IPC_IPC_MESSAGE_H__