Keep track of fixed positioning in accessibility tree.

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

 /*
  * Copyright (C) 2008 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
@@ skipping 79 matching lines @@
   return GetNode() ? ToElement(GetNode()) : nullptr;
 }
 
 KURL AXImageMapLink::Url() const {
   if (!AreaElement())
     return KURL();
 
   return AreaElement()->Href();
 }
 
-void AXImageMapLink::GetRelativeBounds(
-    AXObject** out_container,
-    FloatRect& out_bounds_in_container,
-    SkMatrix44& out_container_transform) const {
+void AXImageMapLink::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();
 
   HTMLAreaElement* area = AreaElement();
   HTMLMapElement* map = MapElement();
   if (!area || !map)
     return;
 
   LayoutObject* layout_object;
   if (parent_ && parent_->IsAXLayoutObject())
     layout_object = ToAXLayoutObject(parent_)->GetLayoutObject();
   else
     layout_object = map->GetLayoutObject();
 
   if (!layout_object)
     return;
 
   out_bounds_in_container = area->GetPath(layout_object).BoundingRect();
   *out_container = AxObjectCache().GetOrCreate(layout_object);
 }
 
 DEFINE_TRACE(AXImageMapLink) {
   AXNodeObject::Trace(visitor);
 }
 
 }  // namespace blink