Use ChannelMojo for remote security key channels.

remoting/host/security_key/security_key_ipc_server.cc

Index: remoting/host/security_key/security_key_ipc_server.cc
diff --git a/remoting/host/security_key/security_key_ipc_server.cc b/remoting/host/security_key/security_key_ipc_server.cc
index 5af25b627f83c0cd97bf8df8adcfd551ad3e9ef0..624f616b4f981df70c91e221ead892b62a778c5e 100644
--- a/remoting/host/security_key/security_key_ipc_server.cc
+++ b/remoting/host/security_key/security_key_ipc_server.cc
@@ -38,15 +38,16 @@ std::unique_ptr<SecurityKeyIpcServer> SecurityKeyIpcServer::Create(
     ClientSessionDetails* client_session_details,
     base::TimeDelta initial_connect_timeout,
     const SecurityKeyAuthHandler::SendMessageCallback& message_callback,
+    const base::Closure& connect_callback,
     const base::Closure& done_callback) {
   std::unique_ptr<SecurityKeyIpcServer> ipc_server =
       g_factory
           ? g_factory->Create(connection_id, client_session_details,
                               initial_connect_timeout, message_callback,
-                              done_callback)
+                              connect_callback, done_callback)
           : base::WrapUnique(new SecurityKeyIpcServerImpl(
                 connection_id, client_session_details, initial_connect_timeout,
-                message_callback, done_callback));
+                message_callback, connect_callback, done_callback));
 
   return ipc_server;
 }