[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/negotiating_authenticator_base.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_PROTOCOL_NEGOTIATING_AUTHENTICATOR_BASE_H_
 #define REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_BASE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 46 matching lines @@
 //  * The host never sends its own supported methods back to the client, so once
 //      the host picks a method from the client's list, it's final.
 //  * Any change in this class must maintain compatibility between any version
 //      mix of webapp, client plugin and host, for both Me2Me and IT2Me.
 class NegotiatingAuthenticatorBase : public Authenticator {
  public:
   virtual ~NegotiatingAuthenticatorBase();
 
   // Authenticator interface.
   virtual State state() const OVERRIDE;
+  virtual bool has_auth_started() const OVERRIDE;
   virtual RejectionReason rejection_reason() const OVERRIDE;
   virtual scoped_ptr<ChannelAuthenticator>
       CreateChannelAuthenticator() const OVERRIDE;
 
   // Calls |current_authenticator_| to process |message|, passing the supplied
   // |resume_callback|.
   void ProcessMessageInternal(const buzz::XmlElement* message,
                               const base::Closure& resume_callback);
 
   const AuthenticationMethod& current_method_for_testing() const {
@@ skipping 24 matching lines @@
   RejectionReason rejection_reason_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NegotiatingAuthenticatorBase);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_BASE_H_