[Autofill] Autofill fails to fill credit card number when split across fields.

components/autofill/core/browser/autofill_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_AUTOFILL_FIELD_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_FIELD_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 47 matching lines @@
   // input type in a 32-bit hash.
   std::string FieldSignature() const;
 
   // Returns true if the field type has been determined (without the text in the
   // field).
   bool IsFieldFillable() const;
 
   void set_default_value(const std::string& value) { default_value_ = value; }
   const std::string& default_value() const { return default_value_; }
 
+  void set_credit_card_number_offset(size_t position) {
+    credit_card_number_offset_ = position;
+  }
+  size_t credit_card_number_offset() const {
+    return credit_card_number_offset_;
+  }
+
   // Set |field_data|'s value to |value|. Uses |field|, |address_language_code|,
   // and |app_locale| as hints when filling exceptional cases like phone number
   // values and <select> fields. Returns |true| if the field has been filled,
   // |false| otherwise.
   static bool FillFormField(const AutofillField& field,
                             const base::string16& value,
                             const std::string& address_language_code,
                             const std::string& app_locale,
                             FormFieldData* field_data);
 
@@ skipping 20 matching lines @@
 
   // The set of possible types for this field.
   ServerFieldTypeSet possible_types_;
 
   // Used to track whether this field is a phone prefix or suffix.
   PhonePart phone_part_;
 
   // The default value returned by the Autofill server.
   std::string default_value_;
 
+  // Used to hold the position of the first digit to be copied as a substring
+  // from credit card number.
+  size_t credit_card_number_offset_;
+
   DISALLOW_COPY_AND_ASSIGN(AutofillField);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_FIELD_H_