[Autofill] Enable heuristic detection of credit card issuer fields.

chrome/browser/autofill/form_field.h

 // Copyright (c) 2011 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 CHROME_BROWSER_AUTOFILL_FORM_FIELD_H_
 #define CHROME_BROWSER_AUTOFILL_FORM_FIELD_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 70 matching lines @@
   // information.  |ParseFormFields| coordinates the parsing and extraction
   // of types from an input vector of |AutofillField| objects and delegates
   // the type extraction via this method.
   virtual bool ClassifyField(FieldTypeMap* map) const = 0;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(FormFieldTest, Match);
 
   // Function pointer type for the parsing function that should be passed to the
   // ParseFormFieldsPass() helper function.
-  typedef FormField* ParseFunction(AutofillScanner* scanner,
-                                   bool parse_new_field_types);
+  typedef FormField* ParseFunction(AutofillScanner* scanner);
 
   // Matches |pattern| to the contents of the field at the head of the
   // |scanner|.
   // Returns |true| if a match is found according to |match_type|, and |false|
   // otherwise.
   static bool MatchAndAdvance(AutofillScanner* scanner,
                               const string16& pattern,
                               int match_type,
                               const AutofillField** match);
 
   // Matches the regular expression |pattern| against the components of |field|
   // as specified in the |match_type| bit field (see |MatchType|).
   static bool Match(const AutofillField* field,
                     const string16& pattern,
                     int match_type);
 
   // Perform a "pass" over the |fields| where each pass uses the supplied
   // |parse| method to match content to a given field type.
   // |fields| is both an input and an output parameter.  Upon exit |fields|
   // holds any remaining unclassified fields for further processing.
   // Classification results of the processed fields are stored in |map|.
   static void ParseFormFieldsPass(ParseFunction parse,
-                                  bool parse_new_field_types,
                                   std::vector<const AutofillField*>* fields,
                                   FieldTypeMap* map);
 
   DISALLOW_COPY_AND_ASSIGN(FormField);
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_FORM_FIELD_H_