[Autofill] Don't validate China UnionPay cards with the Luhn checksum.

BUG=242274
TEST=unit_tests
R=abodenha@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18927003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@211986 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed