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

Source/core/rendering/RenderTableSection.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, 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 109 matching lines @@
 }
 
 void RenderTableSection::addChild(RenderObject* child, RenderObject* beforeChild)
 {
     if (!child->isTableRow()) {
         RenderObject* last = beforeChild;
         if (!last)
             last = lastChild();
         if (last && last->isAnonymous() && !last->isBeforeOrAfterContent()) {
             if (beforeChild == last)
-                beforeChild = last->firstChild();
+                beforeChild = last->slowFirstChild();
             last->addChild(child, beforeChild);
             return;
         }
 
         if (beforeChild && !beforeChild->isAnonymous() && beforeChild->parent() == this) {
             RenderObject* row = beforeChild->previousSibling();
             if (row && row->isTableRow() && row->isAnonymous()) {
                 row->addChild(child);
                 return;
             }
@@ skipping 1361 matching lines @@
             unsigned insertionRow = m_cRow;
             m_cRow++;
             m_cCol = 0;
             ensureRows(m_cRow);
 
             RenderTableRow* tableRow = toRenderTableRow(row);
             m_grid[insertionRow].rowRenderer = tableRow;
             tableRow->setRowIndex(insertionRow);
             setRowLogicalHeightToRowStyleLogicalHeight(m_grid[insertionRow]);
 
-            for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
+            for (RenderObject* cell = tableRow->firstChild(); cell; cell = cell->nextSibling()) {
                 if (!cell->isTableCell())
                     continue;
 
                 RenderTableCell* tableCell = toRenderTableCell(cell);
                 addCell(tableCell, tableRow);
             }
         }
     }
 
     m_grid.shrinkToFit();
@@ skipping 208 matching lines @@
     else
         cellLocation.setX(table()->columnPositions()[effectiveColumn] + horizontalBorderSpacing);
 
     cell->setLogicalLocation(cellLocation);
 
     if (!RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
         view()->addLayoutDelta(oldCellLocation - cell->location());
 }
 
 } // namespace WebCore