Allow MessageFilters to restrict listening to specific message classes

content/browser/geolocation/geolocation_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/geolocation/geolocation_dispatcher_host.h"
 
 #include <map>
 #include <set>
 #include <utility>
 
@@ skipping 277 matching lines @@
 
 // static
 GeolocationDispatcherHost* GeolocationDispatcherHost::New(
     int render_process_id,
     GeolocationPermissionContext* geolocation_permission_context) {
   return new GeolocationDispatcherHostImpl(
       render_process_id,
       geolocation_permission_context);
 }
 
-GeolocationDispatcherHost::GeolocationDispatcherHost() {
+GeolocationDispatcherHost::GeolocationDispatcherHost()
+    : BrowserMessageFilter(GeolocationMsgStart) {
 }
 
 GeolocationDispatcherHost::~GeolocationDispatcherHost() {
 }
 
 }  // namespace content