RefCounted types should not have public destructors, content/browser part 2

content/renderer/media/audio_message_filter.h

Index: content/renderer/media/audio_message_filter.h
diff --git a/content/renderer/media/audio_message_filter.h b/content/renderer/media/audio_message_filter.h
index 8df9d3f671d703d5753b5d74c51170892f426122..40faeabec271c8d6fbd2c8c0ec3d5c4e221d9340 100644
--- a/content/renderer/media/audio_message_filter.h
+++ b/content/renderer/media/audio_message_filter.h
@@ -38,7 +38,6 @@ class CONTENT_EXPORT AudioMessageFilter
   };
 
   AudioMessageFilter();
-  virtual ~AudioMessageFilter();
 
   // Add a delegate to the map and return id of the entry.
   int32 AddDelegate(Delegate* delegate);
@@ -49,16 +48,19 @@ class CONTENT_EXPORT AudioMessageFilter
   // Sends an IPC message using |channel_|.
   bool Send(IPC::Message* message);
 
- private:
-  FRIEND_TEST_ALL_PREFIXES(AudioMessageFilterTest, Basic);
-  FRIEND_TEST_ALL_PREFIXES(AudioMessageFilterTest, Delegates);
-
   // IPC::ChannelProxy::MessageFilter override. Called on IO thread.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
   virtual void OnFilterRemoved() OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
 
+ protected:
+  virtual ~AudioMessageFilter();
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(AudioMessageFilterTest, Basic);
+  FRIEND_TEST_ALL_PREFIXES(AudioMessageFilterTest, Delegates);
+
   // Received when browser process has created an audio output stream.
   void OnStreamCreated(int stream_id, base::SharedMemoryHandle handle,
 #if defined(OS_WIN)
@@ -73,9 +75,6 @@ class CONTENT_EXPORT AudioMessageFilter
   // changed.
   void OnStreamStateChanged(int stream_id, AudioStreamState state);
 
-  // Notification of volume property of an audio output stream.
-  void OnStreamVolume(int stream_id, double volume);
-
   // A map of stream ids to delegates.
   IDMap<Delegate> delegates_;