Fixing curtain mode using non-default RDP port for Windows host.

remoting/host/win/chromoting_lib_idl.templ

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import "oaidl.idl";
 import "ocidl.idl";
 
 [
   object,
   uuid(b59b96da-83cb-40ee-9b91-c377400fc3e3),
@@ skipping 15 matching lines @@
   object,
   uuid(6a7699f0-ee43-43e7-aa30-a6738f9bd470),
   nonextensible,
   helpstring("IRdpDesktopSession Interface"),
   pointer_default(unique)
 ]
 interface IRdpDesktopSession : IUnknown {
   [ id(1), helpstring("Initiates a loopback RDP connection to spawn a new "
                       "Windows session. |width| and |height| specify the "
                       "initial screen resolution. |terminal_id| specifies a "
-                      "unique value to be used to identify this connection.") ]
+                      "unique value to be used to identify this connection."
+                      "|port_number| specifies the RDP port number to use.") ]
   HRESULT Connect([in] long width, [in] long height, [in] BSTR terminal_id,
+                  [in] DWORD port_number,
                   [in] IRdpDesktopSessionEventHandler* event_handler);
 
   [ id(2), helpstring("Shuts down the connection created by Connect().") ]
   HRESULT Disconnect();
 
   [ id(3), helpstring("Changes the screen resolution.") ]
   HRESULT ChangeResolution([in] long width, [in] long height);
 
   [ id(4), helpstring("Sends Secure Attention Sequence to the session.") ]
   HRESULT InjectSas();
 };
 
 [
   uuid(b6396c45-b0cc-456b-9f49-f12964ee6df4),
   version(1.0),
   helpstring("Chromoting 1.0 Type Library")
 ]
 library ChromotingLib {
   importlib("stdole2.tlb");
 
   [
     uuid(@RDP_DESKTOP_SESSION_CLSID@),
     helpstring("RdpDesktopSession Class")
   ]
   coclass RdpDesktopSession {
     [default] interface IRdpDesktopSession;
   };
 };