Eliminate the virtual position() function from RenderObject.  Rename the position() overrides
        in RenderText and RenderBox to positionLineBox and devirtualize them.
        
        Patch the one call site to just check for isText() and isBox() and call the methods directly.
        
        Remove some unnecessary overrides of position() on table sections and rows.
    
        Reviewed by Simon Fraser

        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::positionLineBox):
        * rendering/RenderBox.h:
        * rendering/RenderObject.h:
        * rendering/RenderSVGRoot.cpp:
        * rendering/RenderSVGRoot.h:
        * rendering/RenderTableRow.h:
        (WebCore::RenderTableRow::lineHeight):
        * rendering/RenderTableSection.h:
        (WebCore::RenderTableSection::lineHeight):
        * rendering/RenderText.cpp:
        (WebCore::RenderText::positionLineBox):
        * rendering/RenderText.h:
        * rendering/bidi.cpp:
        (WebCore::RenderBlock::computeVerticalPositionsForLine):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@40875 268f45cc-cd09-0410-ab3c-d52691b4dbfc