[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/connection_to_client.cc

 // Copyright 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/connection_to_client.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "net/base/io_buffer.h"
@@ skipping 141 matching lines @@
     case Session::CLOSED:
       Close(OK);
       break;
 
     case Session::FAILED:
       Close(session_->error());
       break;
   }
 }
 
+void ConnectionToClient::OnSessionAuthenticationBegin() {
+  DCHECK(handler_);
+  handler_->OnConnectionAuthenticating(this);
+}
+
 void ConnectionToClient::OnSessionRouteChange(
     const std::string& channel_name,
     const TransportRoute& route) {
   handler_->OnRouteChange(this, channel_name, route);
 }
 
 void ConnectionToClient::OnChannelInitialized(bool successful) {
   DCHECK(CalledOnValidThread());
 
   if (!successful) {
@@ skipping 28 matching lines @@
 
 void ConnectionToClient::CloseChannels() {
   control_dispatcher_.reset();
   event_dispatcher_.reset();
   video_writer_.reset();
   audio_writer_.reset();
 }
 
 }  // namespace protocol
 }  // namespace remoting