Revert "Allow MessageFilters to restrict listening to specific message classes"

content/browser/renderer_host/p2p/socket_dispatcher_host.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 "content/browser/renderer_host/p2p/socket_dispatcher_host.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "content/browser/renderer_host/p2p/socket_host.h"
 #include "content/common/p2p_messages.h"
@@ skipping 78 matching lines @@
 
   std::string host_name_;
   net::SingleRequestHostResolver resolver_;
 
   DoneCallback done_callback_;
 };
 
 P2PSocketDispatcherHost::P2PSocketDispatcherHost(
     content::ResourceContext* resource_context,
     net::URLRequestContextGetter* url_context)
-    : BrowserMessageFilter(P2PMsgStart),
-      resource_context_(resource_context),
+    : resource_context_(resource_context),
       url_context_(url_context),
       monitoring_networks_(false) {
 }
 
 void P2PSocketDispatcherHost::OnChannelClosing() {
   // Since the IPC channel is gone, close pending connections.
   STLDeleteContainerPairSecondPointers(sockets_.begin(), sockets_.end());
   sockets_.clear();
 
   STLDeleteContainerPointers(dns_requests_.begin(), dns_requests_.end());
@@ skipping 179 matching lines @@
 void P2PSocketDispatcherHost::OnAddressResolved(
     DnsRequest* request,
     const net::IPAddressList& addresses) {
   Send(new P2PMsg_GetHostAddressResult(request->request_id(), addresses));
 
   dns_requests_.erase(request);
   delete request;
 }
 
 }  // namespace content