add 'slow' prefix to RenderObject's firstChild() / lastChild() methods

Source/core/rendering/RenderTable.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 179 matching lines @@
             section->addChild(child);
             return;
         }
     }
 
     RenderObject* lastBox = beforeChild;
     while (lastBox && lastBox->parent()->isAnonymous() && !lastBox->isTableSection() && needsTableSection(lastBox))
         lastBox = lastBox->parent();
     if (lastBox && lastBox->isAnonymous() && !isAfterContent(lastBox)) {
         if (beforeChild == lastBox)
-            beforeChild = lastBox->firstChild();
+            beforeChild = lastBox->slowFirstChild();
         lastBox->addChild(child, beforeChild);
         return;
     }
 
     if (beforeChild && !beforeChild->isTableSection() && needsTableSection(beforeChild))
         beforeChild = 0;
 
     RenderTableSection* section = RenderTableSection::createAnonymousWithParentRenderer(this);
     addChild(section, beforeChild);
     section->addChild(child);
@@ skipping 384 matching lines @@
 // Collect all the unique border values that we want to paint in a sorted list.
 void RenderTable::recalcCollapsedBorders()
 {
     if (m_collapsedBordersValid)
         return;
     m_collapsedBordersValid = true;
     m_collapsedBorders.clear();
     for (RenderObject* section = firstChild(); section; section = section->nextSibling()) {
         if (!section->isTableSection())
             continue;
-        for (RenderObject* row = section->firstChild(); row; row = row->nextSibling()) {
+        for (RenderObject* row = toRenderTableSection(section)->firstChild(); row; row = row->nextSibling()) {
             if (!row->isTableRow())
                 continue;
-            for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
+            for (RenderObject* cell = toRenderTableRow(row)->firstChild(); cell; cell = cell->nextSibling()) {
                 if (!cell->isTableCell())
                     continue;
                 ASSERT(toRenderTableCell(cell)->table() == this);
                 toRenderTableCell(cell)->collectBorderValues(m_collapsedBorders);
             }
         }
     }
     RenderTableCell::sortBorderValues(m_collapsedBorders);
 }
 
@@ skipping 838 matching lines @@
 const BorderValue& RenderTable::tableEndBorderAdjoiningCell(const RenderTableCell* cell) const
 {
     ASSERT(cell->isFirstOrLastCellInRow());
     if (hasSameDirectionAs(cell->row()))
         return style()->borderEnd();
 
     return style()->borderStart();
 }
 
 }