Fix latest to be consistent.

mount_gpt_image.sh

 #!/bin/bash
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Helper script that mounts chromium os image from a device or directory
 # and creates mount points for /var and /usr/local (if in dev_mode).
 
 . "$(dirname "$0")/common.sh"
@@ skipping 118 matching lines @@
   if [ ${FLAGS_read_only} -eq ${FLAGS_FALSE} ]; then
     setup_symlinks_on_root "${FLAGS_stateful_mountpt}/dev_image" \
       "${FLAGS_stateful_mountpt}/var" "${FLAGS_stateful_mountpt}"
   fi
   echo "Image specified by ${FLAGS_from} mounted at"\
     "${FLAGS_rootfs_mountpt} successfully."
 }
 
 # Find the last image built on the board.
 if [ ${FLAGS_most_recent} -eq ${FLAGS_TRUE} ] ; then
-  IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images/${FLAGS_board}"
-  FLAGS_from="${IMAGES_DIR}/$(ls -t ${IMAGES_DIR} 2>&-| head -1)"
+  FLAGS_from="$(./get_latest_image.sh --board="${FLAGS_board}")"
 fi
 
 # Turn path into an absolute path.
 FLAGS_from=`eval readlink -f ${FLAGS_from}`
 
 # Perform desired operation.
 if [ ${FLAGS_unmount} -eq ${FLAGS_TRUE} ] ; then
   unmount_image
 else
   mount_image
 fi