build: Re-hide pointless question in image_to_usb.sh --test_image.

src/scripts/image_to_usb.sh

 #!/bin/bash
 
 # Copyright (c) 2009 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.
 
 # Script to convert the output of build_image.sh to a usb image.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
@@ skipping 97 matching lines @@
   if [ ! -f "${FLAGS_from}/chromiumos_test_image.bin" ] || \
      [ ${FLAGS_force_copy} -eq ${FLAGS_TRUE} ] ; then
     # Copy it.
     echo "Creating test image from original..."
     cp -f "${SRC_IMAGE}" "${FLAGS_from}/chromiumos_test_image.bin"
 
     # Check for manufacturing image.
     if [ ${FLAGS_factory} -eq ${FLAGS_TRUE} ] ; then
       FACTORY_ARGS="--factory"
     fi
-    # Check for yes
-    if [ ${FLAGS_yes} -eq ${FLAGS_TRUE} ] ; then
-      YES="--yes"
-    fi
 
-
-    # Modify it.
+    # Modify it.  Pass --yes so that mod_image_for_test.sh won't ask us if we
+    # really want to modify the image; the user gave their assent already with
+    # --test-image and the original image is going to be preserved.
     "${SCRIPTS_DIR}/mod_image_for_test.sh" --image \
-      "${FLAGS_from}/chromiumos_test_image.bin" ${FACTORY_ARGS} ${YES}
+      "${FLAGS_from}/chromiumos_test_image.bin" ${FACTORY_ARGS} --yes
     echo "Done with mod_image_for_test."
   else
     echo "Using cached test image."
   fi
   SRC_IMAGE="${FLAGS_from}/chromiumos_test_image.bin"
   echo "Source test image is: ${SRC_IMAGE}"
 fi
 
 STATEFUL_DIR="${FLAGS_from}/stateful_partition"
 mkdir -p "${STATEFUL_DIR}"
@@ skipping 105 matching lines @@
   echo "   sudo dd if=${FLAGS_to} of=/dev/sdb bs=4M"
   echo "where /dev/sdb is the entire keyfob."
   if [ ${INSIDE_CHROOT} -eq 1 ]
   then
     example=$(basename "${FLAGS_to}")
     echo "NOTE: Since you are currently inside the chroot, and you'll need to"
     echo "run dd outside the chroot, the path to the USB image will be"
     echo "different (ex: ~/chromeos/trunk/src/build/images/SOME_DIR/$example)."
   fi
 fi