Keep track of fixed positioning in accessibility tree.

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

 /*
  * 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 46 matching lines @@
   bool ComputeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
 
   Element* AnchorElement() const override;
   Element* ActionElement() const override;
   KURL Url() const override;
   bool IsLink() const override { return true; }
   bool IsLinked() const override { return true; }
   AXObject* ComputeParent() const override;
   void GetRelativeBounds(AXObject** out_container,
                          FloatRect& out_bounds_in_container,
-                         SkMatrix44& out_container_transform) const override;
+                         SkMatrix44& out_container_transform,
+                         bool& out_is_fixed_positioned) const override;
 
  private:
   bool IsImageMapLink() const override { return true; }
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXImageMapLink, IsImageMapLink());
 
 }  // namespace blink
 
 #endif  // AXImageMapLink_h