Don't use rowIndex() if needsCellRecalc().

Source/core/rendering/RenderTableCell.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 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 367 matching lines @@
     // is no such line box or table-row, the baseline is the bottom of content edge of the cell box.
     LayoutUnit firstLineBaseline = firstLineBoxBaseline();
     if (firstLineBaseline != -1)
         return firstLineBaseline;
     return paddingBefore() + borderBefore() + contentLogicalHeight();
 }
 
 void RenderTableCell::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
     ASSERT(style()->display() == TABLE_CELL);
-    ASSERT(!row() || row()->rowIndexWasSet());
 
     RenderBlockFlow::styleDidChange(diff, oldStyle);
     setHasBoxDecorationBackground(true);
 
     if (parent() && section() && oldStyle && style()->height() != oldStyle->height())
-        section()->rowLogicalHeightChanged(rowIndex());
+        section()->rowLogicalHeightChanged(row());
 
     // Our intrinsic padding pushes us down to align with the baseline of other cells on the row. If our vertical-align
     // has changed then so will the padding needed to align with other cells - clear it so we can recalculate it from scratch.
     if (oldStyle && style()->verticalAlign() != oldStyle->verticalAlign())
         clearIntrinsicPadding();
 
     // If border was changed, notify table.
     if (parent()) {
         RenderTable* table = this->table();
         if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout()&& oldStyle && oldStyle->border() != style()->border())
@@ skipping 856 matching lines @@
 
 RenderTableCell* RenderTableCell::createAnonymousWithParentRenderer(const RenderObject* parent)
 {
     RenderTableCell* newCell = RenderTableCell::createAnonymous(&parent->document());
     RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(parent->style(), TABLE_CELL);
     newCell->setStyle(newStyle.release());
     return newCell;
 }
 
 } // namespace blink