Fix recent change which prevented mount_gpt_image from running outside chroot.

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).
 
 # --- BEGIN COMMON.SH BOILERPLATE ---
@@ skipping 10 matching lines @@
       SCRIPT_ROOT=${path}
       break
     fi
   done
 }
 
 find_common_sh
 . "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
 # --- END COMMON.SH BOILERPLATE ---
 
-# Need to be inside the chroot to load chromeos-common.sh
-assert_inside_chroot
-
+if [ $INSIDE_CHROOT -ne 1 ]; then
+  INSTALL_ROOT="$SRC_ROOT/platform/installer/"
+else
+  INSTALL_ROOT=/usr/lib/installer/
+fi
 # Load functions and constants for chromeos-install
-. "/usr/lib/installer/chromeos-common.sh" || \
-  die "Unable to load /usr/lib/installer/chromeos-common.sh"
+. "${INSTALL_ROOT}/chromeos-common.sh" || \
+  die "Unable to load ${INSTALL_ROOT}/chromeos-common.sh"
 
 locate_gpt
 
 get_default_board
 
 # Flags.
 DEFINE_string board "$DEFAULT_BOARD" \
   "The board for which the image was built." b
 DEFINE_boolean read_only $FLAGS_FALSE \
   "Mount in read only mode -- skips stateful items."
@@ skipping 132 matching lines @@
 FLAGS_from=`eval readlink -f ${FLAGS_from}`
 FLAGS_rootfs_mountpt=`eval readlink -f ${FLAGS_rootfs_mountpt}`
 FLAGS_stateful_mountpt=`eval readlink -f ${FLAGS_stateful_mountpt}`
 
 # Perform desired operation.
 if [ ${FLAGS_unmount} -eq ${FLAGS_TRUE} ] ; then
   unmount_image
 else
   mount_image
 fi