2009-05-13  David Hyatt  <hyatt@apple.com>

        Reviewed by Beth Dakin and Darin Adler.

        Fix for <rdar://problem/6869687> REGRESSION (r41203): Facebook friend suggestions disappear on update.
        
        Make sure that renderers are marked for layout if a style change causes them to switch from having a self-painting layer
        to a non-self-painting layer (and vice versa).
        
        Move misplaced layer repainting code that was in RenderBox up into RenderBoxModelObject so that inlines with layers
        repaint properly on opacity changes, etc.

        Added fast/repaint/opacity-change-on-overflow-float.html.

        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::styleWillChange):
        * rendering/RenderBoxModelObject.cpp:
        (WebCore::RenderBoxModelObject::styleWillChange):
        (WebCore::RenderBoxModelObject::styleDidChange):
        * rendering/RenderBoxModelObject.h:

LayoutTests:

2009-05-13  David Hyatt  <hyatt@apple.com>

        Reviewed by Beth Dakin and Darin Adler.

        Add a repaint test for <rdar://problem/6869687> REGRESSION (r41203): Facebook friend suggestions disappear on update.

        * fast/repaint/opacity-change-on-overflow-float.html: Added.
        * platform/mac/fast/repaint/opacity-change-on-overflow-float-expected.checksum: Added.
        * platform/mac/fast/repaint/opacity-change-on-overflow-float-expected.png: Added.
        * platform/mac/fast/repaint/opacity-change-on-overflow-float-expected.txt: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@43657 268f45cc-cd09-0410-ab3c-d52691b4dbfc