InlinedVisitor: Migrate dom to use inlined tracing

Source/core/dom/Position.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2009 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1217 matching lines @@
     for (const LayoutObject* r = m_anchorNode->renderer(); r; r = r->parent()) {
         if (r->isRenderBlockFlow()) {
             primaryDirection = r->style()->direction();
             break;
         }
     }
 
     return primaryDirection;
 }
 
-void Position::trace(Visitor* visitor)
+DEFINE_TRACE(Position)
 {
     visitor->trace(m_anchorNode);
 }
 
 void Position::debugPosition(const char* msg) const
 {
     if (isNull())
         fprintf(stderr, "Position [%s]: null\n", msg);
     else
         fprintf(stderr, "Position [%s]: %s [%p] at %d\n", msg, deprecatedNode()->nodeName().utf8().data(), deprecatedNode(), m_offset);
@@ skipping 64 matching lines @@
     pos.showTreeForThis();
 }
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
 }
 
 #endif