Autofill: Set requirements for number of recognized fields in an autofillable form

components/autofill/core/browser/credit_card_field.cc

Index: components/autofill/core/browser/credit_card_field.cc
diff --git a/components/autofill/core/browser/credit_card_field.cc b/components/autofill/core/browser/credit_card_field.cc
index dc0d3e7ecc33feaeb9f62fec925b33044a06b8b0..73cf16bc810f8806a3696199f752f9b5bdabe714 100644
--- a/components/autofill/core/browser/credit_card_field.cc
+++ b/components/autofill/core/browser/credit_card_field.cc
@@ -243,6 +243,28 @@ bool CreditCardField::ClassifyField(ServerFieldTypeMap* map) const {
   return ok;
 }
 
+size_t CreditCardField::FieldCount() const {
+  size_t count = 0;
+
+  if (cardholder_)
+    ++count;
+  if (cardholder_last_)
+    ++count;
+  if (type_)
+    ++count;
+  count += numbers_.size();

[Evan Stade, 2015/01/21 22:52:49]

this should probably be

if (!numbers_.empty())
  ++count;

[Lei Zhang, 2015/01/22 08:07:36]

Done.

+  if (verification_)
+    ++count;
+  if (expiration_month_)
+    ++count;
+  if (expiration_year_)
+    ++count;
+  if (expiration_date_)
+    ++count;
+
+  return count;;
+}
+
 ServerFieldType CreditCardField::GetExpirationYearType() const {
   return (expiration_date_
               ? exp_year_type_