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

content/browser/renderer_host/media/midi_host.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_HOST_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 10 matching lines @@
 namespace content {
 
 class CONTENT_EXPORT MIDIHost
     : public BrowserMessageFilter,
       public media::MIDIManagerClient {
  public:
   // Called from UI thread from the owner of this object.
   MIDIHost(int renderer_process_id, media::MIDIManager* midi_manager);
 
   // BrowserMessageFilter implementation.
-  virtual void OnChannelClosing() OVERRIDE;
   virtual void OnDestruct() const OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
 
   // MIDIManagerClient implementation.
   virtual void ReceiveMIDIData(
       uint32 port,
       const uint8* data,
       size_t length,
       double timestamp) OVERRIDE;
@@ skipping 32 matching lines @@
 
   // Protects access to |sent_bytes_in_flight_|.
   base::Lock in_flight_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(MIDIHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_HOST_H_