[Autofill] Fill fields that have an autocomplete attributes even if not in a form.

components/autofill/core/browser/form_structure.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_FORM_STRUCTURE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_FORM_STRUCTURE_H_
 
 #include <stddef.h>
 
 #include <set>
@@ skipping 283 matching lines @@
   // the real values of |has_author_specified_types_| and
   // |has_author_specified_sections_|.
   bool was_parsed_for_autocomplete_attributes_;
 
   // True if the form contains at least one password field.
   bool has_password_field_;
 
   // True if the form is a <form>.
   bool is_form_tag_;
 
+  // True if the form is made of unowned fields in a non checkout flow.
+  bool is_formless_checkout_;
+
   DISALLOW_COPY_AND_ASSIGN(FormStructure);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_FORM_STRUCTURE_H_