Remove clips where we can show that they are unnecessary.

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 589 matching lines @@
     // Technically it's odd that we are incorporating the borders into layout overflow, which is only supposed to be about overflow from our
     // descendant objects, but since tables don't support overflow:auto, this works out fine.
     if (collapseBorders()) {
         int rightBorderOverflow = width() + outerBorderRight() - borderRight();
         int leftBorderOverflow = borderLeft() - outerBorderLeft();
         int bottomBorderOverflow = height() + outerBorderBottom() - borderBottom();
         int topBorderOverflow = borderTop() - outerBorderTop();
         IntRect borderOverflowRect(leftBorderOverflow, topBorderOverflow, rightBorderOverflow - leftBorderOverflow, bottomBorderOverflow - topBorderOverflow);
         if (borderOverflowRect != pixelSnappedBorderBoxRect()) {
             addLayoutOverflow(borderOverflowRect);
-            addVisualOverflow(borderOverflowRect);
+            addVisualOverflow(borderOverflowRect, VisualOverflowNotClipped);
         }
     }
 
     // Add overflow from our caption.
     for (unsigned i = 0; i < m_captions.size(); i++)
         addOverflowFromChild(m_captions[i]);
 
     // Add overflow from our sections.
     for (RenderTableSection* section = topSection(); section; section = sectionBelow(section))
         addOverflowFromChild(section);
@@ skipping 818 matching lines @@
 const BorderValue& RenderTable::tableEndBorderAdjoiningCell(const RenderTableCell* cell) const
 {
     ASSERT(cell->isFirstOrLastCellInRow());
     if (hasSameDirectionAs(cell->row()))
         return style()->borderEnd();
 
     return style()->borderStart();
 }
 
 }