Reviewed by Hyatt.  Patch by Mitz.

        - test and updated results for http://bugzilla.opendarwin.org/show_bug.cgi?id=9497
          REGRESSION: Incomplete repainting when scrolling thumbnails on Flickr

        * fast/repaint/clipped-relative-expected.checksum: Added.
        * fast/repaint/clipped-relative-expected.png: Added.
        * fast/repaint/clipped-relative-expected.txt: Added.
        * fast/repaint/clipped-relative.html: Added.
        * fast/repaint/containing-block-position-change-expected.checksum: Updated.
        * fast/repaint/containing-block-position-change-expected.png: Updated.

WebCore:

        Reviewed by Hyatt.  Patch by Mitz.

        - fix http://bugzilla.opendarwin.org/show_bug.cgi?id=9497
          REGRESSION: Incomplete repainting when scrolling thumbnails on Flickr

        Test: fast/repaint/clipped-relative.html

        * page/FrameView.cpp:
        (WebCore::FrameView::layout):
        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::removePositionedObjects): Removed call to computeRepaintRects().
        Previously, it was needed to update the cached rects before RenderBox::setStyle()
        called updateLayerPositions().
        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::setStyle): Changed to call updateLayerPositions() for a newly-
        created layer only if it does not need layout. Otherwise,  updateLayerPositions() will
        be called after layout. This saves a repaint in some cases.
        * rendering/RenderLayer.cpp:
        (WebCore::RenderLayer::checkForRepaintOnResize): Renamed computeRepaintRects() to
        this and deleted the code that cached the absolute position and repaint rects.
        (WebCore::RenderLayer::updateLayerPositions): Added code to cache the absolute
        position and repaint rects right after updating the layer's position.
        * rendering/RenderLayer.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14983 268f45cc-cd09-0410-ab3c-d52691b4dbfc