[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/connection_to_client.cc

Index: remoting/protocol/connection_to_client.cc
diff --git a/remoting/protocol/connection_to_client.cc b/remoting/protocol/connection_to_client.cc
index dd32452ef9acebf945a0fbac925c3d8fd729aa22..40de9452a90de4eb486f6338d39223eb1290487e 100644
--- a/remoting/protocol/connection_to_client.cc
+++ b/remoting/protocol/connection_to_client.cc
@@ -159,6 +159,11 @@ void ConnectionToClient::OnSessionStateChange(Session::State state) {
   }
 }
 
+void ConnectionToClient::OnSessionAuthenticationBegin() {
+  DCHECK(handler_);
+  handler_->OnConnectionAuthenticating(this);
+}
+
 void ConnectionToClient::OnSessionRouteChange(
     const std::string& channel_name,
     const TransportRoute& route) {