Use lsregister -f to work around Launch Services problems

chrome/installer/mac/keystone_install.sh

 #!/bin/bash -p
 
 # 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.
 
 # usage: keystone_install.sh update_dmg_mount_point
 #
 # Called by the Keystone system to update the installed application with a new
 # version from a disk image.
@@ skipping 1057 matching lines @@
   # lsregister's exit codes shouldn't be confused with this script's own.
   # Redirect stdout to /dev/null to suppress the useless "ThrottleProcessIO:
   # throttling disk i/o" messages that lsregister might print.
   note "notifying LaunchServices"
   local cs_fwk="/System/Library/Frameworks/CoreServices.framework"
   local ls_fwk="${cs_fwk}/Frameworks/LaunchServices.framework"
   local lsregister="${ls_fwk}/Support/lsregister"
   note "cs_fwk = ${cs_fwk}"
   note "ls_fwk = ${ls_fwk}"
   note "lsregister = ${lsregister}"
-  "${lsregister}" "${installed_app}" > /dev/null || true
+  "${lsregister}" -f "${installed_app}" > /dev/null || true
 
   # The brand information is stored differently depending on whether this is
   # running for a system or user ticket.
   note "handling brand code"
 
   local set_brand_file_access=
   local brand_plist
   if [[ -n "${system_ticket}" ]]; then
     # System ticket.
     set_brand_file_access="y"
@@ skipping 316 matching lines @@
 
 # Check "less than" instead of "not equal to" in case Keystone ever changes to
 # pass more arguments.
 if [[ ${#} -lt 1 ]]; then
   usage
   exit 2
 fi
 
 main "${@}"
 exit ${?}