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..386e344c4936190b45a33aeeb30838af3da2af54 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 It2MeObserver;
 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<It2MeObserver> it2me_observer_;
 
   scoped_refptr<ChromotingHost> host_;
   int failed_login_attempts_;