[Autofill] Autofill fails to fill credit card number when split across 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 26 matching lines @@
   // last names; for such pages cardholder_ holds the first name field and
   // we store the last name field here.
   // (We could store an embedded NameField object here, but we don't do so
   // because the text patterns for matching a cardholder name are different
   // than for ordinary names, and because cardholder names never have titles,
   // middle names or suffixes.)
   const AutofillField* cardholder_last_;
 
   // TODO(jhawkins): Parse the select control.
   const AutofillField* type_;  // Optional.
-  const AutofillField* number_;  // Required.
+  const AutofillField* number_full_;   // Required.
+  const AutofillField* number_part1_;  // Optional.
+  const AutofillField* number_part2_;  // Optional.
+  const AutofillField* number_part3_;  // Optional.
+  const AutofillField* number_part4_;  // Optional.
 
   // The 3-digit card verification number; we don't currently fill this.
   const AutofillField* verification_;
 
   // Either |expiration_date_| or both |expiration_month_| and
   // |expiration_year_| are required.
   const AutofillField* expiration_month_;
   const AutofillField* expiration_year_;
   const AutofillField* expiration_date_;
 
   // True if the year is detected to be a 2-digit year; otherwise, we assume
   // a 4-digit year.
   bool is_two_digit_year_;
 
   DISALLOW_COPY_AND_ASSIGN(CreditCardField);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_CREDIT_CARD_FIELD_H_