Swap RenderBox and RenderContainer. Make leaf RenderObjects actually derive off...

	Swap RenderBox and RenderContainer.  Make leaf RenderObjects actually derive off of RenderBox instead.

        Reviewed by kocienda

        * khtml/rendering/render_block.cpp:
        (khtml::RenderBlock::addChildToFlow):
        * khtml/rendering/render_box.cpp:
        (RenderBox::RenderBox):
        (RenderBox::detach):
        * khtml/rendering/render_box.h:
        * khtml/rendering/render_container.cpp:
        (RenderContainer::RenderContainer):
        (RenderContainer::detach):
        * khtml/rendering/render_container.h:
        * khtml/rendering/render_flow.cpp:
        (RenderFlow::detach):
        (RenderFlow::dirtyLineBoxes):
        (RenderFlow::createInlineBox):
        (RenderFlow::getAbsoluteRepaintRect):
        (RenderFlow::lowestPosition):
        (RenderFlow::rightmostPosition):
        (RenderFlow::leftmostPosition):
        (RenderFlow::caretPos):
        * khtml/rendering/render_flow.h:
        (khtml::RenderFlow::RenderFlow):
        * khtml/rendering/render_frames.cpp:
        (RenderFrameSet::RenderFrameSet):
        (RenderFrameSet::nodeAtPoint):
        (RenderFrameSet::dump):
        * khtml/rendering/render_frames.h:
        * khtml/rendering/render_inline.cpp:
        (RenderInline::addChildToFlow):
        * khtml/rendering/render_replaced.cpp:
        * khtml/rendering/render_replaced.h:
        (khtml::RenderReplaced::setIntrinsicHeight):
        * khtml/rendering/render_table.cpp:
        (RenderTableSection::RenderTableSection):
        (RenderTableSection::detach):
        (RenderTableSection::setStyle):
        * khtml/rendering/render_table.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7440 268f45cc-cd09-0410-ab3c-d52691b4dbfc