Remove --country.  It's not useful enough anymore.

BUG=350454
TEST=none
R=mpearson@chromium.org

Review URL: https://codereview.chromium.org/189623018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256042 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256042