Implement CreditCardField, a FormField that matches a credit card field in a form.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/502018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@34736 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 70110e6..5004d95 100755
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -90,6 +90,8 @@
         'browser/autofill/autofill_manager.h',
         'browser/autofill/autofill_type.cc',
         'browser/autofill/autofill_type.h',
+        'browser/autofill/credit_card_field.cc',
+        'browser/autofill/credit_card_field.h',
         'browser/autofill/field_types.h',
         'browser/autofill/form_field.cc',
         'browser/autofill/form_field.h',