Remove unused param "width_" from SearchBox::OnMarginChange().

This is a prep CL to fix crbug.com/247517 and crbug.com/272583.

BUG=none
TEST=none
TBR=cevans@chromium.org

Review URL: https://codereview.chromium.org/148683002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247828 0039d316-1c4b-4281-b951-d872f2087c98
Make an online wildcard login check for enterprise devices.

This checks with GAIA to reconfirm whether a given user is permitted
to log in to a device. The check complements the existing login
whitelist check based on device policy.

BUG=chromium:336284
TEST=Manual

Review URL: https://codereview.chromium.org/148843002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247829 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247829