Oilpan: fix build after r197563.

Source/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 1074 matching lines @@
     if (m_changeObserver)
         m_changeObserver->didChangeVisibleSelection();
 }
 
 DEFINE_TRACE(VisibleSelection)
 {
     visitor->trace(m_base);
     visitor->trace(m_extent);
     visitor->trace(m_start);
     visitor->trace(m_end);
+    visitor->trace(m_baseInComposedTree);
+    visitor->trace(m_extentInComposedTree);
+    visitor->trace(m_startInComposedTree);
+    visitor->trace(m_endInComposedTree);
     visitor->trace(m_changeObserver);
 }
 
 static bool isValidPosition(const Position& position)
 {
     if (!position.inDocument())
         return false;
 
     if (position.anchorType() != Position::PositionIsOffsetInAnchor)
         return true;
@@ skipping 94 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif