Allow MessageFilters to restrict listening to specific message classes

chrome/browser/media/webrtc_logging_handler_host.cc

 // Copyright 2013 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 "chrome/browser/media/webrtc_logging_handler_host.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 91 matching lines @@
        it != meta_data.end(); ++it) {
     *message += it->first + ": " + it->second + '\n';
   }
   // Remove last '\n'.
   message->resize(message->size() - 1);
 }
 
 }  // namespace
 
 WebRtcLoggingHandlerHost::WebRtcLoggingHandlerHost(Profile* profile)
-    : profile_(profile),
+    : BrowserMessageFilter(WebRtcLoggingMsgStart),
+      profile_(profile),
       logging_state_(CLOSED),
       upload_log_on_render_close_(false) {
   DCHECK(profile_);
 }
 
 WebRtcLoggingHandlerHost::~WebRtcLoggingHandlerHost() {}
 
 void WebRtcLoggingHandlerHost::SetMetaData(
     const MetaDataMap& meta_data,
     const GenericDoneCallback& callback) {
@@ skipping 295 matching lines @@
 void WebRtcLoggingHandlerHost::FireGenericDoneCallback(
     GenericDoneCallback* callback, bool success,
     const std::string& error_message) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(!(*callback).is_null());
   content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
                                    base::Bind(*callback, success,
                                               error_message));
   (*callback).Reset();
 }