Properly EscapeForHTML potentially malicious input from X.509 certificates.

BUG=142956

TEST=Create an X.509 certificate with a CN field that contains JavaScript.
When you get the SSL error screen, check that the HTML + JavaScript is
escape instead of being treated as HTML and/or script.

Review URL: https://chromiumcodereview.appspot.com/10827364

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152210 0039d316-1c4b-4281-b951-d872f2087c98