Add support for chromium

Fixes #20.

tdrop

@@ -508,6 +508,11 @@ create_win_return_wid() {
 		blacklist=$(xdotool search --classname urxvtd)
 		pid=$(pgrep urxvtd)
 		eval "$program_command"
+	elif [[ $program =~ ^chromium ]]; then
+		# this may work fine
+		# pid=$(pgrep -o chromium)
+		pid=$(pgrep -a chromium | awk '!/--type/ {print $1}')
+		eval "$program_command"
 	else
 		eval "$program_command"
 		pid=$!