Revert 249921 "Adding application name message in kiosk mode aft..."

Leaking memory on Linux Chromium OS ASAN Tests (3) bot, ex.:
https://gist.github.com/anonymous/4e2f8f182a41a09641c4/raw/63429ed5ac896ba13174286e5d553346494bce55/gistfile1.txt

> Adding application name message in kiosk mode after user timeout
> 
> This is a security feature for a user who interacts with a kiosk device - making sure that he/she knows which application is running.
> 
> When a user interacts with the device after 2 minutes of inactivity, a message shows which application is running and who was the author.
> 
> When spoken feedback is turned on, the device will also narrowate the content of the message.
> 
> The message itself will slide in from the top and - after a short timeout - will automatically slide out again.
> 
> BUG=268453
> TEST=unit test & visual test
> 
> Review URL: https://codereview.chromium.org/131353007

TBR=skuhne@chromium.org

Review URL: https://codereview.chromium.org/158263002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249931 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249931