Reviewed by John Sullivan.

        - fix <rdar://problem/5424455> REGRESSION (r21168-r21193, Tiger only): Safari scrollbar is clipped at top when loading particular RSS page

        Test: fast/repaint/layout-state-only-posiitoned.html

        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::layoutOnlyPositionedObjects): Pop layout state
        before updating scroll info, which possibly repaints us.

LayoutTests:

        Reviewed by John Sullivan,

        - repaint test for <rdar://problem/5424455> REGRESSION (r21168-r21193, Tiger only): Safari scrollbar is clipped at top when loading particular RSS page

        * fast/repaint/layout-state-only-posiitoned.html: Added.
        * platform/mac/fast/repaint/layout-state-only-posiitoned-expected.checksum: Added.
        * platform/mac/fast/repaint/layout-state-only-posiitoned-expected.png: Added.
        * platform/mac/fast/repaint/layout-state-only-posiitoned-expected.txt: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27224 268f45cc-cd09-0410-ab3c-d52691b4dbfc