Simplify compareDocumentPosition

Source/core/dom/TreeScope.cpp

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 2012 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 387 matching lines @@
     if (chain1[index1 - 1] != chain2[index2 - 1])
         return Node::DOCUMENT_POSITION_DISCONNECTED | Node::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC;
 
     for (unsigned i = std::min(index1, index2); i; --i) {
         const TreeScope* child1 = chain1[--index1];
         const TreeScope* child2 = chain2[--index2];
         if (child1 != child2) {
             Node* shadowHost1 = child1->rootNode().parentOrShadowHostNode();
             Node* shadowHost2 = child2->rootNode().parentOrShadowHostNode();
             if (shadowHost1 != shadowHost2)
-                return shadowHost1->compareDocumentPositionInternal(shadowHost2, Node::TreatShadowTreesAsDisconnected);
+                return shadowHost1->compareDocumentPosition(shadowHost2, Node::TreatShadowTreesAsDisconnected);
 
             for (const ShadowRoot* child = toShadowRoot(child2->rootNode()).olderShadowRoot(); child; child = child->olderShadowRoot())
                 if (child == child1)
                     return Node::DOCUMENT_POSITION_FOLLOWING;
 
             return Node::DOCUMENT_POSITION_PRECEDING;
         }
     }
 
     // There was no difference between the two parent chains, i.e., one was a subset of the other. The shorter
@@ skipping 124 matching lines @@
     visitor->trace(m_document);
     visitor->trace(m_parentTreeScope);
     visitor->trace(m_idTargetObserverRegistry);
     visitor->trace(m_selection);
     visitor->trace(m_elementsById);
     visitor->trace(m_imageMapsByName);
     visitor->trace(m_labelsByForAttribute);
 }
 
 } // namespace blink