Make BrowserMessageFilter not derive from IPC::ChannelProxy::MessageFilter. This allows us to hide …

content/browser/renderer_host/media/media_stream_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/media/media_stream_dispatcher_host.h"
 
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/renderer_host/media/web_contents_capture_util.h"
 #include "content/common/media/media_stream_messages.h"
 #include "content/common/media/media_stream_options.h"
@@ skipping 107 matching lines @@
     IPC_MESSAGE_HANDLER(MediaStreamHostMsg_EnumerateDevices,
                         OnEnumerateDevices)
     IPC_MESSAGE_HANDLER(MediaStreamHostMsg_OpenDevice,
                         OnOpenDevice)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
   return handled;
 }
 
 void MediaStreamDispatcherHost::OnChannelClosing() {
-  BrowserMessageFilter::OnChannelClosing();
   DVLOG(1) << "MediaStreamDispatcherHost::OnChannelClosing";
 
   // Since the IPC channel is gone, close all requesting/requested streams.
   for (StreamMap::iterator it = streams_.begin();
        it != streams_.end();
        ++it) {
     std::string label = it->first;
     media_stream_manager_->StopGeneratedStream(label);
   }
   // Clear the map after we have stopped all the streams.
@@ skipping 87 matching lines @@
            << security_origin.spec() << ")";
 
   const std::string& label = media_stream_manager_->OpenDevice(
       this, render_process_id_, render_view_id, page_request_id,
       device_id, type, security_origin);
   DCHECK(!label.empty());
   streams_[label] = StreamRequest(render_view_id, page_request_id);
 }
 
 }  // namespace content