Expose setSequentialFocusNavigationStartingPoint to accessibility.

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

 /*
  * Copyright (C) 2008, 2009, 2011 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 1548 matching lines @@
                  scrollOffset.height() - innerRect.y());
     } else if (inner->isWebArea()) {
       // Otherwise, if the inner object is a web area, reset the coordinate
       // transformation.
       offsetX = 0;
       offsetY = 0;
     }
   }
 }
 
+void AXObject::setSequentialFocusNavigationStartingPoint() {
+  // Call it on the nearest ancestor that overrides this with a specific
+  // implementation.
+  if (parentObject())
+    parentObject()->setSequentialFocusNavigationStartingPoint();
+}
+
 void AXObject::notifyIfIgnoredValueChanged() {
   bool isIgnored = accessibilityIsIgnored();
   if (lastKnownIsIgnoredValue() != isIgnored) {
     axObjectCache().childrenChanged(parentObject());
     setLastKnownIsIgnoredValue(isIgnored);
   }
 }
 
 void AXObject::selectionChanged() {
   if (AXObject* parent = parentObjectIfExists())
@@ skipping 155 matching lines @@
 }
 
 DEFINE_TRACE(AXObject) {
   visitor->trace(m_children);
   visitor->trace(m_parent);
   visitor->trace(m_cachedLiveRegionRoot);
   visitor->trace(m_axObjectCache);
 }
 
 }  // namespace blink