Handle Security Key requests from outside the remoted session correctly

remoting/host/chromoting_messages.h

 // 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.
 
 #ifndef REMOTING_HOST_CHROMOTING_MESSAGES_H_
 #define REMOTING_HOST_CHROMOTING_MESSAGES_H_
 
 #include <stdint.h>
 
 #include "base/memory/shared_memory_handle.h"
@@ skipping 233 matching lines @@
 
 // The array of bytes representing a security key request to be sent to the
 // remote client.
 IPC_MESSAGE_CONTROL1(ChromotingRemoteSecurityKeyToNetworkMsg_Request,
                      std::string /* request bytes */)
 
 //---------------------------------------------------------
 // Chromoting messages sent from the network process to the remote_security_key
 // process.
 
-// The array of bytes representing a security key response from the remote
-// client.  This message is sent over the per-client IPC channel.
+// The array of bytes representing the security key response from the client.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkToRemoteSecurityKeyMsg_Response,
                      std::string /* response bytes */)
+
+// Indicates the channel used for security key message passing is ready for use.
+IPC_MESSAGE_CONTROL0(ChromotingNetworkToRemoteSecurityKeyMsg_ConnectionReady)
+
+// Error indicating the request originated from outside the remoted session.
+// The IPC channel will be disconnected after this message has been sent.
+IPC_MESSAGE_CONTROL0(ChromotingNetworkToRemoteSecurityKeyMsg_InvalidSession)