Revert 254079 "Added a special badge to wifi-networks behind a c..."

> Added a special badge to wifi-networks behind a captive portal.
> 
> BUG=240237
> TEST=manual tests on Lumpy
> R=oshima@chromium.org, stevenjb@chromium.org
> 
> Review URL: https://codereview.chromium.org/175053003

TBR=ygorshenin@google.com

Review URL: https://codereview.chromium.org/180613003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254086 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254086