Chromium PepperFlash reverts

[booman]

The first thing I noticed with Ubuntu 14.04 and Mint 17 is that Chromium no longer automatically installs flash for you.

So on to google I went...
I found that you have to add a PPA then install Pepper flash with Terminal:

To add the PPA and install Adobe Pepper Flash from Google Chrome in Ubuntu (to be used in Chromium), use the following commands:

sudo add-apt-repository ppa:skunk/pepper-flash
sudo apt-get update
sudo apt-get install pepflashplugin-installer

Once installed, there's one more step to get Chromium to use the Google Chrome Pepper Flash Player: you need to open /etc/chromium-browser/default as root with a text editor (e.g.: gedit - which I'll use in the command below):

sudo apt-get install gksu #it`s not installed by default in Ubuntu 13.04
gksu gksu gedit /etc/chromium-browser/default

("gksu" is used twice to avoid a bug with Gedit opening a blank file next to our file)

and in that file, paste the following line at the bottom of the file (after the CHROMIUM_FLAGS="" line):

. /usr/lib/pepflashplugin-installer/pepflashplayer.sh

(yes, there's a dot in the beginning of the line, then a space!)

This works just fine, but when I reboot, the updated flash player is no longer installed.
I found that if I use nano and copy paste the last step again, it works. But once I reboot, again its missing.

How can I permanently add the line in /etc/chromium-browser/default?