Fix a bug that caused timezone setting looked enabled for non-owner users
Fix a bug that caused timezone setting looked enabled for non-owner users

select:hover and select:active take effects only when the control is enabled.
color of select is graytext when the control is disabled

BUG=chromium-os:11291
TEST=confirmed that the setting looked disabled as intended

Review URL: http://codereview.chromium.org/6814042
Patch from Ryo Hashimoto <hashimoto@chromium.org>.

git-svn-id: http://src.chromium.org/svn/trunk/src@81067 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5562858f1e4d432d1646f8237622d8515a757d88
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser