Reviewed by Darin Adler and Dave Hyatt.

        - eliminate excessive repainting when an object's final position
          after layout is unchanged

        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::layoutBlockChildren): Removed the full repaint
        for the case that the final position is unchanged but the position at
        which an intermediate layout occurred was different. Any repainting
        done during the intermediate layout would have happened at the object's
        initial (and also final) coordinates, since layoutDelta is factored
        into repaint rect calculations.

LayoutTests:

        Reviewed by Darin Adler.

        - updated pixel results for "eliminate excessive repainting when an
          object's final position after layout is unchanged"

        * platform/mac/fast/repaint/intermediate-layout-position-clip-expected.checksum:
        * platform/mac/fast/repaint/intermediate-layout-position-clip-expected.png:
        * platform/mac/fast/repaint/intermediate-layout-position-expected.checksum:
        * platform/mac/fast/repaint/intermediate-layout-position-expected.png:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@34267 268f45cc-cd09-0410-ab3c-d52691b4dbfc