Add support for passing an arbitrary parameter to an IPC message handler. The motivation is for Web…

content/browser/renderer_host/p2p/socket_dispatcher_host.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 CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_DISPATCHER_HOST_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 42 matching lines @@
   friend struct BrowserThread::DeleteOnThread<BrowserThread::IO>;
   friend class base::DeleteHelper<P2PSocketDispatcherHost>;
 
   typedef std::map<int, P2PSocketHost*> SocketsMap;
 
   class DnsRequest;
 
   P2PSocketHost* LookupSocket(int socket_id);
 
   // Handlers for the messages coming from the renderer.
-  void OnStartNetworkNotifications(const IPC::Message& msg);
-  void OnStopNetworkNotifications(const IPC::Message& msg);
-
+  void OnStartNetworkNotifications();
+  void OnStopNetworkNotifications();
   void OnGetHostAddress(const std::string& host_name,
                         int32 request_id);
 
   void OnCreateSocket(P2PSocketType type,
                       int socket_id,
                       const net::IPEndPoint& local_address,
                       const P2PHostAndIPEndPoint& remote_address);
   void OnAcceptIncomingTcpConnection(int listen_socket_id,
                                      const net::IPEndPoint& remote_address,
                                      int connected_socket_id);
@@ skipping 20 matching lines @@
 
   std::set<DnsRequest*> dns_requests_;
   P2PMessageThrottler throttler_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PSocketDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_DISPATCHER_HOST_H_