[chrome] also download chrome components

you probably want something like this in your /etc/chromium/default:
CHROMIUM_FLAGS="--ppapi-flash-path=/usr/lib/chromium/PepperFlash/libpepflashplayer.so --ppapi-flash-version=$(grep '"version":' /usr/lib/chromium/PepperFlash/manifest.json| grep -Po '(?<=version": ")(?:\d|\.)*')"