Keep track of fixed positioning in accessibility tree.

third_party/WebKit/Source/modules/accessibility/AXMenuListOption.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 137 matching lines @@
     return false;
 
   return IsEnabled();
 }
 
 bool AXMenuListOption::ComputeAccessibilityIsIgnored(
     IgnoredReasons* ignored_reasons) const {
   return AccessibilityIsIgnoredByDefault(ignored_reasons);
 }
 
-void AXMenuListOption::GetRelativeBounds(
-    AXObject** out_container,
-    FloatRect& out_bounds_in_container,
-    SkMatrix44& out_container_transform) const {
+void AXMenuListOption::GetRelativeBounds(AXObject** out_container,
+                                         FloatRect& out_bounds_in_container,
+                                         SkMatrix44& out_container_transform,
+                                         bool& out_is_fixed_positioned) const {
   *out_container = nullptr;
   out_bounds_in_container = FloatRect();
   out_container_transform.setIdentity();
 
   AXObject* parent = ParentObject();
   if (!parent)
     return;
   DCHECK(parent->IsMenuListPopup());
 
   AXObject* grandparent = parent->ParentObject();
   if (!grandparent)
     return;
   DCHECK(grandparent->IsMenuList());
   grandparent->GetRelativeBounds(out_container, out_bounds_in_container,
-                                 out_container_transform);
+                                 out_container_transform,
+                                 out_is_fixed_positioned);
 }
 
 String AXMenuListOption::TextAlternative(bool recursive,
                                          bool in_aria_labelled_by_traversal,
                                          AXObjectSet& visited,
                                          AXNameFrom& name_from,
                                          AXRelatedObjectVector* related_objects,
                                          NameSources* name_sources) const {
   // If nameSources is non-null, relatedObjects is used in filling it in, so it
   // must be non-null as well.
@@ skipping 31 matching lines @@
 
   return 0;
 }
 
 DEFINE_TRACE(AXMenuListOption) {
   visitor->Trace(element_);
   AXMockObject::Trace(visitor);
 }
 
 }  // namespace blink