Use the version tool to pull the version number instead of executing the data...

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 77 matching lines @@
     SVN_URL=$(echo "${SVN_INFO}" | sed -Ene 's/^URL: (.*)$/\1/p')
     SVN_ROOT=$(echo "${SVN_INFO}" | sed -Ene 's/^Repository Root: (.*)$/\1/p')
     if [ -n "${SVN_ROOT}" ] && \
        [ "${SVN_URL:0:${#SVN_ROOT}}" = "${SVN_ROOT}" ] ; then
       SVN_PATH="${SVN_URL:${#SVN_ROOT}}"
     fi
   fi
 fi
 
 # Pull in the Chrome version number.
-. "${TOP}/chrome/VERSION"
-FULL_VERSION="${MAJOR}.${MINOR}.${BUILD}.${PATCH}"
+VERSION_TOOL="${TOP}/chrome/tools/build/version.py"
+VERSION_FILE="${TOP}/chrome/VERSION"
+FULL_VERSION=$("${VERSION_TOOL}" -f "${VERSION_FILE}" \
+    -t "@MAJOR@.@MINOR@.@BUILD@.@PATCH@")
+BUNDLE_VERSION=$("${VERSION_TOOL}" -f "${VERSION_FILE}" -t "@BUILD@.@PATCH@")
 
 # I really hate how "defaults" doesn't take a real pathname but instead insists
 # on appending ".plist" to everything.
 TMP_INFO_PLIST_DEFAULTS="${TEMP_DIR}/Info"
 TMP_INFO_PLIST="${TMP_INFO_PLIST_DEFAULTS}.plist"
 cp "${TARGET_BUILD_DIR}/${INFOPLIST_PATH}" "${TMP_INFO_PLIST}"
 
 # Save off the Subversion revision number and source root path in case they're
 # needed.
 if [ ! -z "${SVN_REVISION}" ] ; then
@@ skipping 12 matching lines @@
 defaults write "${TMP_INFO_PLIST_DEFAULTS}" \
     CFBundleShortVersionString -string "${FULL_VERSION}"
 # Honor the 429496.72.95 limit.  The maximum comes from splitting 2^32 - 1 into
 # 6, 2, 2 digits.  The limitation was present in Tiger, but it could have been
 # fixed in later OS release, but hasn't been tested (it's easy enough to find
 # out with "lsregister -dump).
 # http://lists.apple.com/archives/carbon-dev/2006/Jun/msg00139.html
 # BUILD will always be an increasing value, so BUILD_PATH gives us something
 # unique that meetings what LS wants.
 defaults write "${TMP_INFO_PLIST_DEFAULTS}" \
-    CFBundleVersion -string "${BUILD}.${PATCH}"
+    CFBundleVersion -string "${BUNDLE_VERSION}"
 
 # Add or remove the Breakpad keys.
 if [ "${USE_BREAKPAD}" = "1" ] ; then
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" \
       BreakpadURL "https://clients2.google.com/cr/report"
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" BreakpadReportInterval "3600"
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" \
       BreakpadProduct "${BUILD_BRANDING}_Mac"
   defaults write "${TMP_INFO_PLIST_DEFAULTS}" \
       BreakpadProductDisplay "${BUILD_BRANDING}"
@@ skipping 35 matching lines @@
 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}"