Add gnubby authentication to remoting host

remoting/host/ipc_desktop_environment.cc

Index: remoting/host/ipc_desktop_environment.cc
diff --git a/remoting/host/ipc_desktop_environment.cc b/remoting/host/ipc_desktop_environment.cc
index 6ec6676ed8c8c98894f013dd56e7acc639a36d1d..51254941fae061f36f2ab3ed2ccc600d5091c782 100644
--- a/remoting/host/ipc_desktop_environment.cc
+++ b/remoting/host/ipc_desktop_environment.cc
@@ -16,6 +16,7 @@
 #include "remoting/host/client_session_control.h"
 #include "remoting/host/desktop_session.h"
 #include "remoting/host/desktop_session_proxy.h"
+#include "remoting/host/gnubby_auth_handler.h"
 #include "remoting/host/input_injector.h"
 #include "remoting/host/screen_controls.h"
 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
@@ -69,6 +70,11 @@ void IpcDesktopEnvironment::SetCapabilities(const std::string& capabilities) {
   return desktop_session_proxy_->SetCapabilities(capabilities);
 }
 
+scoped_ptr<GnubbyAuthHandler> IpcDesktopEnvironment::CreateGnubbyAuthHandler(
+    protocol::ClientStub* client_stub) {
+  return scoped_ptr<GnubbyAuthHandler>();
+}
+
 IpcDesktopEnvironmentFactory::IpcDesktopEnvironmentFactory(
     scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,