Bug #38374 --> more updates for external helper application support. (NOT PART OF THE BUILD)

code review will come when this is done and gets turned on.

oops i reall don't want this file...take it back.

uriloader/exthandler/mac/MANIFEST

-# The contents of this file are subject to the Netscape Public
-# License Version 1.1 (the "License"); you may not use this file
-# except in compliance with the License. You may obtain a copy of
-# the License at http://www.mozilla.org/NPL/
-#
-# Software distributed under the License is distributed on an "AS
-# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
-# implied. See the License for the specific language governing
-# rights and limitations under the License.
-#
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is Netscape
-# Communications Corporation.  Portions created by Netscape are
-# Copyright (C) 1998 Netscape Communications Corporation. All
-# Rights Reserved.
-#
-# Contributor(s): 
-#
-# This is a list of local files which get copied to the mozilla:dist:uriloader directory
-#
-
-nsOSHelperAppService.h
-
-