Refactor IT2Me-specific functions into a HostObserver subclass.

remoting/host/plugin/host_script_object.h

Index: remoting/host/plugin/host_script_object.h
diff --git a/remoting/host/plugin/host_script_object.h b/remoting/host/plugin/host_script_object.h
index d52ce71c756b2fc0217f12b544d2e98215e74482..259374cf3fa65ea9fdf2fbb5cb2d8364d11cf4e4 100644
--- a/remoting/host/plugin/host_script_object.h
+++ b/remoting/host/plugin/host_script_object.h
@@ -31,6 +31,7 @@ namespace remoting {
 
 class ChromotingHost;
 class DesktopEnvironment;
+class It2MeHostUserInterface;
 class MutableHostConfig;
 class RegisterSupportHostRequest;
 class SignalStrategy;
@@ -182,6 +183,7 @@ class HostNPScriptObject : public HostStatusObserver {
   scoped_refptr<MutableHostConfig> host_config_;
   ChromotingHostContext host_context_;
   scoped_ptr<DesktopEnvironment> desktop_environment_;
+  scoped_ptr<It2MeHostUserInterface> it2me_host_user_interface_;
 
   scoped_refptr<ChromotingHost> host_;
   int failed_login_attempts_;