Handle Security Key requests from outside the remoted session correctly

remoting/host/security_key/fake_security_key_ipc_server.h

Index: remoting/host/security_key/fake_security_key_ipc_server.h
diff --git a/remoting/host/security_key/fake_security_key_ipc_server.h b/remoting/host/security_key/fake_security_key_ipc_server.h
index 7f7f4a3bd97473754c5e1359a2b15c2e597a3e5c..5b8c56845ce51f07321d8c83347cc13b153e0cd9 100644
--- a/remoting/host/security_key/fake_security_key_ipc_server.h
+++ b/remoting/host/security_key/fake_security_key_ipc_server.h
@@ -50,6 +50,12 @@ class FakeSecurityKeyIpcServer : public SecurityKeyIpcServer,
   // Simulates the IPC channel being closed.
   void CloseChannel();
 
+  // Sends a ConnectionReady message to the client.
+  void SendConnectionReadyMessage();
+
+  // Sends an InvalidSession message to the client.
+  void SendInvalidSessionMessage();
+
   // Returns a WeakPtr reference to this instance.
   base::WeakPtr<FakeSecurityKeyIpcServer> AsWeakPtr();