Add gnubby authentication to remoting host

remoting/host/basic_desktop_environment.h

Index: remoting/host/basic_desktop_environment.h
diff --git a/remoting/host/basic_desktop_environment.h b/remoting/host/basic_desktop_environment.h
index dbc9822be3564c2b852bb14f03531113464dce4f..ab38c49da23700bc3d74e7fca64fbb7433e79dd6 100644
--- a/remoting/host/basic_desktop_environment.h
+++ b/remoting/host/basic_desktop_environment.h
@@ -15,6 +15,8 @@
 
 namespace remoting {
 
+class GnubbyAuthHandler;
+
 // Used to create audio/video capturers and event executor that work with
 // the local console.
 class BasicDesktopEnvironment : public DesktopEnvironment {
@@ -28,6 +30,8 @@ class BasicDesktopEnvironment : public DesktopEnvironment {
   virtual scoped_ptr<webrtc::ScreenCapturer> CreateVideoCapturer() OVERRIDE;
   virtual std::string GetCapabilities() const OVERRIDE;
   virtual void SetCapabilities(const std::string& capabilities) OVERRIDE;
+  virtual scoped_ptr<GnubbyAuthHandler> CreateGnubbyAuthHandler(
+      protocol::ClientStub* client_stub) OVERRIDE;
 
  protected:
   friend class BasicDesktopEnvironmentFactory;