[Chromoting] Move CreateSessionToken() next to launch process utilities.

remoting/host/win/launch_process_with_token.h

 // 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.
 
 #ifndef REMOTING_HOST_WIN_LAUNCH_PROCESS_WITH_TOKEN_H_
 #define REMOTING_HOST_WIN_LAUNCH_PROCESS_WITH_TOKEN_H_
 
 #include <windows.h>
 #include <string>
 
 #include "base/file_path.h"
 #include "base/process_util.h"
+#include "base/win/scoped_handle.h"
 
 namespace remoting {
 
+// Creates a copy of the current process token for the given |session_id| so
+// it can be used to launch a process in that session.
+bool CreateSessionToken(uint32 session_id, base::win::ScopedHandle* token_out);
+
 // Launches |binary| in the security context of the user represented by
 // |user_token|. The session ID specified by the token is respected as well.
 bool LaunchProcessWithToken(const FilePath& binary,
                             const std::wstring& command_line,
                             HANDLE user_token,
                             base::Process* process_out);
 
 } // namespace remoting
 
 #endif  // REMOTING_HOST_WIN_LAUNCH_PROCESS_WITH_TOKEN_H_