RefCounted types should not have public destructors, ipc/ edition

ipc/ipc_channel_proxy.h

Index: ipc/ipc_channel_proxy.h
diff --git a/ipc/ipc_channel_proxy.h b/ipc/ipc_channel_proxy.h
index 5cbe664151940ca7ddc179309325b01b34d8495d..789685c9d5bece6eb2ae7ab8bf574c51acd4357d 100644
--- a/ipc/ipc_channel_proxy.h
+++ b/ipc/ipc_channel_proxy.h
@@ -58,7 +58,6 @@ class IPC_EXPORT ChannelProxy : public Message::Sender {
       : public base::RefCountedThreadSafe<MessageFilter, MessageFilterTraits> {
    public:
     MessageFilter();
-    virtual ~MessageFilter();
 
     // Called on the background thread to provide the filter with access to the
     // channel.  Called when the IPC channel is initialized or when AddFilter
@@ -90,6 +89,9 @@ class IPC_EXPORT ChannelProxy : public Message::Sender {
     // derived classes the option of controlling which thread they're deleted
     // on etc.
     virtual void OnDestruct() const;
+
+   protected:
+    virtual ~MessageFilter();
   };
 
   struct MessageFilterTraits {