Reviewed by Haytt.

    Reviewed by Haytt.

        - fix http://bugzilla.opendarwin.org/show_bug.cgi?id=6770
          REGRESSION: Incomplete repaint when block with clipping grows

        * manual-tests/repaint-resized-overflow.html: Added.
        * rendering/RenderLayer.cpp:
        (WebCore::RenderLayer::RenderLayer):
        (WebCore::RenderLayer::computeRepaintRects): Set the m_repaintOverflowOnResize
        flag to true if our object itself needs layout or if we're an overflow
        and have a normal child that needs layout, in which case if we end up
        resizing it will be because of the child, and that child might have not repainted
        itself correctly during its own layout.
        (WebCore::RenderLayer::updateLayerPositions): Do a full repaint if
        m_repaintOverflowOnResize is set and we resized but didn't move.
        * rendering/RenderLayer.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@13982 268f45cc-cd09-0410-ab3c-d52691b4dbfc