Remove clips where we can show that they are unnecessary.

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 1146 matching lines @@
 
     unsigned totalRows = m_grid.size();
     unsigned totalCols = table()->columns().size();
 
     if (!totalRows || !totalCols)
         return;
 
     LayoutPoint adjustedPaintOffset = paintOffset + location();
 
     PaintPhase phase = paintInfo.phase;
-    bool pushedClip = pushContentsClip(paintInfo, adjustedPaintOffset);
+    bool pushedClip = pushContentsClip(paintInfo, adjustedPaintOffset, ForceContentsClip);
     paintObject(paintInfo, adjustedPaintOffset);
     if (pushedClip)
         popContentsClip(paintInfo, phase, adjustedPaintOffset);
 
     if ((phase == PaintPhaseOutline || phase == PaintPhaseSelfOutline) && style()->visibility() == VISIBLE)
         paintOutline(paintInfo, LayoutRect(adjustedPaintOffset, size()));
 }
 
 static inline bool compareCellPositions(RenderTableCell* elem1, RenderTableCell* elem2)
 {
@@ skipping 497 matching lines @@
     if (!style()->isLeftToRightDirection())
         cellLocation.setX(table()->columnPositions()[table()->numEffCols()] - table()->columnPositions()[table()->colToEffCol(cell->col() + cell->colSpan())] + horizontalBorderSpacing);
     else
         cellLocation.setX(table()->columnPositions()[effectiveColumn] + horizontalBorderSpacing);
 
     cell->setLogicalLocation(cellLocation);
     view()->addLayoutDelta(oldCellLocation - cell->location());
 }
 
 } // namespace WebCore