Expose setSequentialFocusNavigationStartingPoint to accessibility.

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

 /*
  * Copyright (C) 2012, Google 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 190 matching lines @@
   // DOM and Render tree access.
   Element* actionElement() const override;
   Element* anchorElement() const override;
   Document* getDocument() const override;
   Node* getNode() const override { return m_node; }
 
   // Modify or take an action on an object.
   void setFocused(bool) final;
   void increment() final;
   void decrement() final;
+  void setSequentialFocusNavigationStartingPoint() final;
 
   // Notifications that this object may have changed.
   void childrenChanged() override;
   void selectionChanged() final;
   void textChanged() override;
   void updateAccessibilityRole() final;
 
   // Position in set and Size of set
   int posInSet() const override;
   int setSize() const override;
@@ skipping 13 matching lines @@
                                AXRelatedObjectVector*,
                                NameSources*,
                                bool* foundTextAlternative) const;
   float stepValueForRange() const;
   bool isDescendantOfElementType(const HTMLQualifiedName& tagName) const;
 };
 
 }  // namespace blink
 
 #endif  // AXNodeObject_h