STEP 1： cd /opt/google/chrome
STEP 2: edit google-chrome file. gedit google-chrome
STEP 3： find this line: exec -a "$0" "$HERE/chrome" "$@".
Mostly this line is in the end of google-chrome file.
Comment it out like this : #exec -a "$0" "$HERE/chrome" "$@"
STEP 4：add a new line at the same place.
exec -a "$0" "$HERE/chrome" "$@" --user-data-dir
STEP 5: save google-chrome file and quit. And then you can use chrome as root user. Enjoy it!
