GitLab

Added stub portalled wifi network for testing captive portal UI on the
ChromeOS build. To use it one's need run chrome with the folliwing
switches:
--disable-stub-ethernet
--use-new-network-connection-handler
--default-stub-network-state-idle
--enable-stub-portalled-wifi

BUG=246391
TEST=manual tests on Lumpy

Review URL: https://chromiumcodereview.appspot.com/22364005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@217099 0039d316-1c4b-4281-b951-d872f2087c98