[Draft] Fix canceling pin prompt causes host overload

remoting/host/pam_authorization_factory_posix.cc

 // 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.
 
 #include "remoting/host/pam_authorization_factory_posix.h"
 
 #include <security/pam_appl.h>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/environment.h"
 #include "remoting/base/logging.h"
 #include "remoting/host/username.h"
 #include "remoting/protocol/channel_authenticator.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
 
 namespace remoting {
 
 namespace {
 class PamAuthorizer : public protocol::Authenticator {
  public:
   PamAuthorizer(scoped_ptr<protocol::Authenticator> underlying);
   virtual ~PamAuthorizer();
 
   // protocol::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<protocol::ChannelAuthenticator>
       CreateChannelAuthenticator() const OVERRIDE;
 
  private:
   void MaybeCheckLocalLogin();
   bool IsLocalLoginAllowed();
@@ skipping 18 matching lines @@
 }
 
 protocol::Authenticator::State PamAuthorizer::state() const {
   if (local_login_status_ == DISALLOWED) {
     return REJECTED;
   } else {
     return underlying_->state();
   }
 }
 
+bool PamAuthorizer::has_auth_started() const {
+  CHECK(underlying_);
+  return underlying_->has_auth_started();
+}
+
 protocol::Authenticator::RejectionReason
 PamAuthorizer::rejection_reason() const {
   if (local_login_status_ == DISALLOWED) {
     return INVALID_CREDENTIALS;
   } else {
     return underlying_->rejection_reason();
   }
 }
 
 void PamAuthorizer::ProcessMessage(const buzz::XmlElement* message,
@@ skipping 90 matching lines @@
     const std::string& remote_jid,
     const buzz::XmlElement* first_message) {
   scoped_ptr<protocol::Authenticator> authenticator(
       underlying_->CreateAuthenticator(local_jid, remote_jid, first_message));
   return scoped_ptr<protocol::Authenticator>(
       new PamAuthorizer(authenticator.Pass()));
 }
 
 
 }  // namespace remoting