Find unused Ash vector icons in Chromium

find_unused_ash_icons.sh

#!/usr/bin/env sh

icons=(ash/resources/vector_icons/*.icon)
icons_stripped=()
for icon in ${icons[@]}; do
  icon=$(basename "$icon")
  icon=${icon/.1x/}
  icon=${icon/.icon/}
  icons_stripped+=($icon)
done

IFS=$'\n' icons_stripped=($(sort -u <<<"${icons_stripped[*]}"))

icon_constants=()
for icon in ${icons_stripped[@]}; do
  icon_constants+=("k${icon//_/}icon")
done

for icon in ${icon_constants[@]}; do
  if ! git grep -q -i "$icon" origin/master -- chrome ui ash; then
    echo $icon
  fi
done