Implement X509Certificate::IsEV for NSS.
Implement X509Certificate::IsEV for NSS.

Factor out PKIXVerifyCert function from Verify and share it with IsEV.

BUG=10911
TEST=EV info shown on omnibar for https://www.thawte.com/, but not on https://bugs.webkit.org/

Review URL: http://codereview.chromium.org/119026

git-svn-id: http://src.chromium.org/svn/trunk/src@22718 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 547e8072cec4529e5cadc39d19a04d04aed53e09
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