RefCounted types should not have public destructors, delegate cleanup

remoting/host/client_session.h

Index: remoting/host/client_session.h
diff --git a/remoting/host/client_session.h b/remoting/host/client_session.h
index 084d153a2de2acaa64684c73dc115e6ed6375d30..ee4c52a2f76ef861cebd66175eb9d813078ba2a2 100644
--- a/remoting/host/client_session.h
+++ b/remoting/host/client_session.h
@@ -34,8 +34,6 @@ class ClientSession : public protocol::HostEventStub,
   // Callback interface for passing events to the ChromotingHost.
   class EventHandler {
    public:
-    virtual ~EventHandler() {}
-
     // Called after authentication has finished successfully.
     virtual void OnSessionAuthenticated(ClientSession* client) = 0;
 
@@ -61,6 +59,9 @@ class ClientSession : public protocol::HostEventStub,
         ClientSession* client,
         const std::string& channel_name,
         const protocol::TransportRoute& route) = 0;
+
+   protected:
+    virtual ~EventHandler() {}
   };
 
   ClientSession(EventHandler* event_handler,