[Draft] Fix canceling pin prompt causes host overload

remoting/host/chromoting_host.h

 // 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.
 
 #ifndef REMOTING_HOST_CHROMOTING_HOST_H_
 #define REMOTING_HOST_CHROMOTING_HOST_H_
 
 #include <list>
 #include <string>
 
@@ skipping 97 matching lines @@
   // Enables/disables curtaining when one or more clients are connected.
   // Takes immediate effect if clients are already connected.
   void SetEnableCurtaining(bool enable);
 
   // Sets the maximum duration of any session. By default, a session has no
   // maximum duration.
   void SetMaximumSessionDuration(const base::TimeDelta& max_session_duration);
 
   ////////////////////////////////////////////////////////////////////////////
   // ClientSession::EventHandler implementation.
+  virtual void OnSessionAuthenticating(ClientSession* client) OVERRIDE;
   virtual bool OnSessionAuthenticated(ClientSession* client) OVERRIDE;
   virtual void OnSessionChannelsConnected(ClientSession* client) OVERRIDE;
   virtual void OnSessionAuthenticationFailed(ClientSession* client) OVERRIDE;
   virtual void OnSessionClosed(ClientSession* session) OVERRIDE;
   virtual void OnSessionSequenceNumber(ClientSession* session,
                                        int64 sequence_number) OVERRIDE;
   virtual void OnSessionRouteChange(
       ClientSession* session,
       const std::string& channel_name,
       const protocol::TransportRoute& route) OVERRIDE;
@@ skipping 76 matching lines @@
   scoped_refptr<protocol::PairingRegistry> pairing_registry_;
 
   base::WeakPtrFactory<ChromotingHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingHost);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CHROMOTING_HOST_H_