Autofill: Better recognize credit card fields.

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"
@@ skipping 13 matching lines @@
   ~CreditCardField() override;
   static scoped_ptr<FormField> Parse(AutofillScanner* scanner);
 
  protected:
   // FormField:
   bool ClassifyField(ServerFieldTypeMap* map) const override;
 
  private:
   friend class CreditCardFieldTest;
 
+  // Examines the current field pointed to by |scanner|, if it exists, and
+  // returns true if the field has a high chance of being of a given type.
+  static bool LikelyCardNumberField(AutofillScanner* scanner);
+  static bool LikelyCardType(AutofillScanner* scanner);
+
+  // Same as above, but a bit less likely since what looks like a CVC field may
+  // also be part of a credit card field.
+  static bool MayBeCardCVCField(AutofillScanner* scanner);
+
+  // A couple common arguments used for match types.
+  static const int kMatchNumAndTel;
+  static const int kMatchNumTelAndPass;
+
   CreditCardField();
 
   // Parses the expiration month/year/date fields. Returns true if it finds
   // something new.
   bool ParseExpirationDate(AutofillScanner* scanner);
 
   // 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_