Reviewed by Dave Hyatt.

        - fix <rdar://problem/5609337> Making a float shorter does not remove it from the floating object list of a nested block it intruded into

        Test: fast/dynamic/float-withdrawal-2.html

        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::layoutBlockChildren): When a float may have
        been withdrawn from a child, mark all descendants if necessary and not
        just the child.

LayoutTests:

        Reviewed by Dave Hyatt.

        - test for <rdar://problem/5609337> Making a float shorter does not remove it from the floating object list of a nested block it intruded into

        * fast/dynamic/float-withdrawal-2.html: Added.
        * platform/mac/fast/dynamic/float-withdrawal-2-expected.checksum: Added.
        * platform/mac/fast/dynamic/float-withdrawal-2-expected.png: Added.
        * platform/mac/fast/dynamic/float-withdrawal-2-expected.txt: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@28048 268f45cc-cd09-0410-ab3c-d52691b4dbfc