Add metadata to content::PasswordForm to keep track of the password usage.

content/public/common/password_form.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 CONTENT_PUBLIC_COMMON_PASSWORD_FORM_H__
 #define CONTENT_PUBLIC_COMMON_PASSWORD_FORM_H__
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 139 matching lines @@
   // Enum to differentiate between manually filled forms and forms with auto
   // generated passwords.
   enum Type {
     TYPE_MANUAL,
     TYPE_GENERATED,
   };
 
   // The form type. Not used yet. Please see http://crbug.com/152422
   Type type;
 
+  // The number of times that this username/password has been used to
+  // authenticate the user.
+  //
+  // When parsing an HTML form, this is not used.
+  int times_used;
+
   PasswordForm();
   ~PasswordForm();
 };
 
 // Map username to PasswordForm* for convenience. See password_form_manager.h.
 typedef std::map<string16, PasswordForm*> PasswordFormMap;
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_PASSWORD_FORM_H__