Enabled WebUI OOBE, login by default.
Enabled WebUI OOBE, login by default.

- Make WebUI OOBE/login on by default;
- Alpha sort the args list;
- Remove obosolete "--disable-domui-menu" arg;
- Remove no longer needed WEBUI_LOGIN;

BUG=chromium-os:6398
TEST=WebUI OOBE/login should be on by default.

Change-Id: Icdb2bd056725085f5ae5c7af94f11e2e6e07ca64
Reviewed-on: http://gerrit.chromium.org/gerrit/7129
Reviewed-by: Zelidrag Hornung <2423ba2b026624ad482ad8e6887b2d657f9c0c43@chromium.org>
Reviewed-by: Daniel Erat <69d56254d3d393520d06e9838c23c147a5fee7d9@chromium.org>
Tested-by: Xiyuan Xia <db97f61d07c31fd69698b8602ab9b0e934f96b23@chromium.org>

chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager