[Mac] Add a strikethrough through insecure url schemes.

BUG=http://crbug.com/22558
TEST=Go to https://www.twitter.com/.  See the cert mismatch warning.  Check that "https://" in the omnibox is red with a strikethrough.
Review URL: http://codereview.chromium.org/215038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27064 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed