[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/pairing_authenticator_base.cc

 // 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.
 
 #include "remoting/protocol/pairing_authenticator_base.h"
 
 #include "base/bind.h"
 #include "remoting/base/constants.h"
 #include "remoting/protocol/channel_authenticator.h"
 
@@ skipping 20 matching lines @@
 PairingAuthenticatorBase::~PairingAuthenticatorBase() {
 }
 
 Authenticator::State PairingAuthenticatorBase::state() const {
   if (waiting_for_authenticator_) {
     return PROCESSING_MESSAGE;
   }
   return v2_authenticator_->state();
 }
 
+bool PairingAuthenticatorBase::started() const {
+  if (!v2_authenticator_) {
+    return false;
+  }
+  return v2_authenticator_->started();
+}
+
 Authenticator::RejectionReason
 PairingAuthenticatorBase::rejection_reason() const {
   if (!v2_authenticator_) {
     return PROTOCOL_ERROR;
   }
   return v2_authenticator_->rejection_reason();
 }
 
 void PairingAuthenticatorBase::ProcessMessage(
     const buzz::XmlElement* message,
@@ skipping 94 matching lines @@
   v2_authenticator_ = authenticator.Pass();
   if (message) {
     ProcessMessage(message, resume_callback);
   } else {
     resume_callback.Run();
   }
 }
 
 }  // namespace protocol
 }  // namespace remoting