Update GnubbyAuthHandler to use the current session ID

remoting/host/security_key/remote_security_key_ipc_server_impl.h

Index: remoting/host/security_key/remote_security_key_ipc_server_impl.h
diff --git a/remoting/host/security_key/remote_security_key_ipc_server_impl.h b/remoting/host/security_key/remote_security_key_ipc_server_impl.h
index c45ff364170e5fb5fb850a5467aec5f405afaa0c..6f34645073fc14c1891bc7df9b06a13d4fb05aa6 100644
--- a/remoting/host/security_key/remote_security_key_ipc_server_impl.h
+++ b/remoting/host/security_key/remote_security_key_ipc_server_impl.h
@@ -7,10 +7,12 @@
 
 #include "remoting/host/security_key/remote_security_key_ipc_server.h"
 
+#include <cstdint>
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
+#include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
@@ -34,6 +36,7 @@ class RemoteSecurityKeyIpcServerImpl : public RemoteSecurityKeyIpcServer,
  public:
   RemoteSecurityKeyIpcServerImpl(
       int connection_id,
+      uint32_t peer_session_id,
       base::TimeDelta initial_connect_timeout,
       const GnubbyAuthHandler::SendMessageCallback& message_callback,
       const base::Closure& done_callback);
@@ -56,6 +59,12 @@ class RemoteSecurityKeyIpcServerImpl : public RemoteSecurityKeyIpcServer,
   // The value assigned to identify the current IPC channel.
   int connection_id_;
 
+  // The expected session id of the process connecting to the IPC channel.
+  uint32_t peer_session_id_;
+
+  // Tracks whether the connection is in the process of being closed.
+  bool connection_close_pending_ = false;
+
   // Timeout for disconnecting the IPC channel if there is no client activity.
   base::TimeDelta initial_connect_timeout_;
 
@@ -79,6 +88,8 @@ class RemoteSecurityKeyIpcServerImpl : public RemoteSecurityKeyIpcServer,
   // thread.
   base::ThreadChecker thread_checker_;
 
+  base::WeakPtrFactory<RemoteSecurityKeyIpcServerImpl> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(RemoteSecurityKeyIpcServerImpl);
 };