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

components/autofill/core/browser/credit_card_field.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_CREDIT_CARD_FIELD_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_CREDIT_CARD_FIELD_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "components/autofill/core/browser/form_field.h"
 
 namespace autofill {
 
 class AutofillField;
 class AutofillScanner;
 
 class CreditCardField : public FormField {
  public:
   ~CreditCardField() override;
   static scoped_ptr<FormField> Parse(AutofillScanner* scanner);
 
  protected:
   // FormField:
   bool ClassifyField(ServerFieldTypeMap* map) const override;
+  size_t FieldCount() const override;
 
  private:
   friend class CreditCardFieldTest;
 
   CreditCardField();
 
   // For the combined expiration field we return |exp_year_type_|; otherwise if
   // |expiration_year_| is having year with |max_length| of 2-digits we return
   // |CREDIT_CARD_EXP_2_DIGIT_YEAR|; otherwise |CREDIT_CARD_EXP_4_DIGIT_YEAR|.
   ServerFieldType GetExpirationYearType() const;
@@ skipping 25 matching lines @@
   // |CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR|; otherwise we store
   // |CREDIT_CARD_EXP_DATE_4_DIGIT_YEAR|.
   ServerFieldType exp_year_type_;
 
   DISALLOW_COPY_AND_ASSIGN(CreditCardField);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_CREDIT_CARD_FIELD_H_