AutoFill forms. We do this by responding to a message from WebKit which send...

chrome/browser/autofill/form_structure.h

 // Copyright (c) 2009 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_STRUCTURE_H_
 #define CHROME_BROWSER_AUTOFILL_FORM_STRUCTURE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/scoped_vector.h"
 #include "chrome/browser/autofill/autofill_field.h"
 #include "chrome/browser/autofill/autofill_type.h"
 #include "chrome/browser/autofill/field_types.h"
 #include "googleurl/src/gurl.h"
 
+struct FormData;
+
 namespace webkit_glue {
 class FormFieldValues;
 }
 
 enum RequestMethod {
   GET,
   POST
 };
 
 // FormStructure stores a single HTML form together with the values entered
@@ skipping 24 matching lines @@
   size_t field_count() const;
 
   // Used for iterating over the fields.
   std::vector<AutoFillField*>::const_iterator begin() const {
     return fields_.begin();
   }
   std::vector<AutoFillField*>::const_iterator end() const {
     return fields_.end();
   }
 
+  bool operator!=(const FormData& form) const;
+
  private:
   // Associates the field with the heuristic type for each of the field views.
   void GetHeuristicFieldInfo(FieldTypeMap* field_types_map);
 
   // The name of the form.
+  // TODO(jhawkins): string16
   std::string form_name_;
 
   // The source URL.
   GURL source_url_;
 
   // The target URL.
   GURL target_url_;
 
   bool has_credit_card_field_;
   bool has_autofillable_field_;
   bool has_password_fields_;
 
   // A vector of all the input fields in the form.  The vector is terminated by
   // a NULL entry.
   ScopedVector<AutoFillField> fields_;
 
   // The names of the form input elements, that are part of the form signature.
   // The string starts with "&" and the names are also separated by the "&"
   // character. E.g.: "&form_input1_name&form_input2_name&...&form_inputN_name"
   std::string form_signature_field_names_;
 
   // GET or POST.
   RequestMethod method_;
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_FORM_STRUCTURE_H_