[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/negotiating_authenticator_base.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/protocol/negotiating_authenticator_base.h"
 
 #include <algorithm>
 #include <sstream>
 
 #include "base/bind.h"
@@ skipping 22 matching lines @@
       rejection_reason_(INVALID_CREDENTIALS) {
 }
 
 NegotiatingAuthenticatorBase::~NegotiatingAuthenticatorBase() {
 }
 
 Authenticator::State NegotiatingAuthenticatorBase::state() const {
   return state_;
 }
 
+bool NegotiatingAuthenticatorBase::started() const {
+  if (!current_authenticator_) {
+    return false;
+  }
+  return current_authenticator_->started();
+}
+
 Authenticator::RejectionReason
 NegotiatingAuthenticatorBase::rejection_reason() const {
   return rejection_reason_;
 }
 
 void NegotiatingAuthenticatorBase::ProcessMessageInternal(
     const buzz::XmlElement* message,
     const base::Closure& resume_callback) {
   if (current_authenticator_->state() == WAITING_MESSAGE) {
     // If the message was not discarded and the authenticator is waiting for it,
@@ skipping 44 matching lines @@
 }
 
 scoped_ptr<ChannelAuthenticator>
 NegotiatingAuthenticatorBase::CreateChannelAuthenticator() const {
   DCHECK_EQ(state(), ACCEPTED);
   return current_authenticator_->CreateChannelAuthenticator();
 }
 
 }  // namespace protocol
 }  // namespace remoting