Official builds should be on the com.google.Chrome update product ID

chrome/tools/build/mac/tweak_info_plist

 #!/bin/bash
 
 # Copyright (c) 2009 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.
 
 set -e
 
 # Pull off the optional args
 USE_BREAKPAD=0
@@ skipping 21 matching lines @@
       ;;
     *)
       echo "Not recognized argument $an_opt"
       exit 1
       ;;
   esac
 done
 shift $(($OPTIND - 1))
 
 # Make sure the branding argument was supplied.
-if [ $# -ne 1 ]; then
-  echo "error: missing branding as an argument" >&2
+if [ $# -ne 2 ]; then
+  echo "usage: $0 [-b 1] [-k 1] [-s 1] BRANDING IDENTIFIER" >&2
   exit 1
 fi
 
 #
 # Xcode supports build variable substitutions and CPP; sadly, that doesn't work
 # because:
 #
 # 1. Xcode wants to do the Info.plist work before it runs any build phases,
 #    this means if we were to generate a .h file for INFOPLIST_PREFIX_HEADER
 #    we'd have to put it in another target so it runs in time.
 # 2. Xcode also doesn't check to see if the header being used as a prefix for
 #    the Info.plist has changed.  So even if we updated it, it's only looking
 #    at the modtime of the info.plist to see if that's changed.
 #
 # So, we work around all of this by making a script build phase that will run
 # during the app build, and simply update the info.plist in place.  This way
 # by the time the app target is done, the info.plist is correct.
 #
 
 TOP="${SRCROOT}/.."
 BUILD_BRANDING=$1
+IDENTIFIER=$2
 
 set -x
 
 if [ "${USE_SVN}" = "1" ] ; then
   # Visible in the about:version page.
   SVN_INFO=$(svn info "${TOP}" 2>/dev/null || true)
   SVN_REVISION=$(echo "${SVN_INFO}" | sed -Ene 's/^Revision: (.*)$/\1/p')
   if [ -z "${SVN_REVISION}" ] ; then
     GIT_INFO=$(git log -1 --grep=git-svn-id --format=%b 2>/dev/null || true)
     SVN_REVISION=$(echo "${GIT_INFO}" | \
@@ skipping 77 matching lines @@
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" BreakpadProduct || true
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" BreakpadProductDisplay || true
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" BreakpadVersion || true
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" BreakpadSendAndExit || true
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" BreakpadSkipConfirm || true
 fi
 
 # Add or remove the Keystone keys (only supported in release builds).
 if [ "${USE_KEYSTONE}" = "1" ] && [ "${CONFIGURATION}" = "Release" ] ; then
   KEYSTONE_URL="https://tools.google.com/service/update2"
-  KEYSTONE_APP_ID=$(defaults read "${TMP_INFO_PLIST_DEFAULTS}" \
-                                                            CFBundleIdentifier)
+  KEYSTONE_APP_ID="${IDENTIFIER}"
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" \
       KSVersion -string "${FULL_VERSION}"
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" KSProductID "${KEYSTONE_APP_ID}"
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" KSUpdateURL "${KEYSTONE_URL}"
 else
   # Make sure the keys aren't there, || true to avoid errors if they aren't.
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" KSVersion || true
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" KSProductID || true
   defaults delete "${TMP_INFO_PLIST_DEFAULTS}" KSUpdateURL || true
 fi
 
 # Info.plist will work perfectly well in any plist format, but traditionally
 # applications use xml1 for this, so convert it back after whatever defaults
 # might have done.
 plutil -convert xml1 "${TMP_INFO_PLIST}"
 cp "${TMP_INFO_PLIST}" "${TARGET_BUILD_DIR}/${INFOPLIST_PATH}"
 
 # Clean up.
 rm -f "${TMP_INFO_PLIST}"