support CC expiration dates in imperative autocomplete dialog.

chrome/browser/autofill/form_structure.cc

Index: chrome/browser/autofill/form_structure.cc
diff --git a/chrome/browser/autofill/form_structure.cc b/chrome/browser/autofill/form_structure.cc
index 87c48f07c1eb19f58585f6c88584c1d640212970..d685878e093a39f90d5e19f7c8f274309665f2a4 100644
--- a/chrome/browser/autofill/form_structure.cc
+++ b/chrome/browser/autofill/form_structure.cc
@@ -190,6 +190,9 @@ AutofillFieldType FieldTypeFromAutocompleteType(
       return CREDIT_CARD_EXP_4_DIGIT_YEAR;
   }
 
+  if (autocomplete_type == "cc-csc")
+    return CREDIT_CARD_VERIFICATION_CODE;
+
   if (autocomplete_type == "tel")
     return PHONE_HOME_WHOLE_NUMBER;