[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/pairing_authenticator_base.h

 // Copyright 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 REMOTING_PROTOCOL_PAIRING_AUTHENTICATOR_BASE_H_
 #define REMOTING_PROTOCOL_PAIRING_AUTHENTICATOR_BASE_H_
 
 #include "base/memory/weak_ptr.h"
 #include "remoting/protocol/authenticator.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
@@ skipping 25 matching lines @@
 // differs, which the client uses to determine that pairing should be offered
 // to the user (see NegotiatingHostAuthenticator::CreateAuthenticator and
 // NegotiatingClientAuthenticator::CreateAuthenticatorForCurrentMethod).
 class PairingAuthenticatorBase : public Authenticator {
  public:
   PairingAuthenticatorBase();
   virtual ~PairingAuthenticatorBase();
 
   // Authenticator interface.
   virtual State state() const OVERRIDE;
+  virtual bool has_auth_started() const OVERRIDE;
   virtual RejectionReason rejection_reason() const OVERRIDE;
   virtual void ProcessMessage(const buzz::XmlElement* message,
                               const base::Closure& resume_callback) OVERRIDE;
   virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE;
   virtual scoped_ptr<ChannelAuthenticator>
       CreateChannelAuthenticator() const OVERRIDE;
 
  protected:
   typedef base::Callback<void(scoped_ptr<Authenticator> authenticator)>
       SetAuthenticatorCallback;
@@ skipping 41 matching lines @@
 
   base::WeakPtrFactory<PairingAuthenticatorBase> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PairingAuthenticatorBase);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_PAIRING_AUTHENTICATOR_H_