Get rid of flat tree version of createVisibleSelection() taking two VisiblePosition

third_party/WebKit/Source/modules/accessibility/AXLayoutObject.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 1934 matching lines @@
   // accessibility nodes are based on visible indexes, which often skips
   // redundant whitespace, for example.
   VisiblePosition anchorVisiblePosition =
       toVisiblePosition(anchorObject, selection.anchorOffset);
   VisiblePosition focusVisiblePosition =
       toVisiblePosition(focusObject, selection.focusOffset);
   if (anchorVisiblePosition.isNull() || focusVisiblePosition.isNull())
     return;
 
   frame->selection().setSelection(
-      createVisibleSelection(anchorVisiblePosition, focusVisiblePosition));
+      SelectionInDOMTree::Builder()
+          .collapse(anchorVisiblePosition.toPositionWithAffinity())
+          .extend(focusVisiblePosition.deepEquivalent())
+          .build());
 }
 
 bool AXLayoutObject::isValidSelectionBound(const AXObject* boundObject) const {
   return getLayoutObject() && boundObject && !boundObject->isDetached() &&
          boundObject->isAXLayoutObject() && boundObject->getLayoutObject() &&
          boundObject->getLayoutObject()->frame() ==
              getLayoutObject()->frame() &&
          &boundObject->axObjectCache() == &axObjectCache();
 }
 
@@ skipping 480 matching lines @@
 
 bool AXLayoutObject::elementAttributeValue(
     const QualifiedName& attributeName) const {
   if (!m_layoutObject)
     return false;
 
   return equalIgnoringCase(getAttribute(attributeName), "true");
 }
 
 }  // namespace blink