Reviewed by Hyatt.

    Reviewed by Hyatt.

        Fix for <rdar://problem/5065396> REGRESSION: leaks in
        RenderBlock::layoutInlineChildren seen on buildbot

        This leak appeared after http://trac.webkit.org/projects/webkit/
        changeset/20188. This change shifted line boxes around in
        removeChild(). But since removeChild() calls
        setNeedsLayoutAndMinMaxRecalc(), all of the line boxes will be
        removed once we actually lay out anyway. So this patch fixes the
        leak by deleting the line boxes instead of shifting them around.

        * editing/IndentOutdentCommand.cpp:
        (WebCore::IndentOutdentCommand::outdentParagraph): Call into
        updateLayout(). This fixes an assertion I got in editing/
        execCommand/4976800.html This is very similar to the line box fix I
        made recently (http://trac.webkit.org/projects/webkit/changeset/
        20177). We need to update layout before relying on VisiblePositions
        after removing a node.
        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::deleteLinesForBlock): New helper function
        since this functionality is needed in three places now.
        (WebCore::RenderBlock::makeChildrenNonInline): Call into new
        deleteLinesForBlock().
        (WebCore::RenderBlock::removeChild): Same.
        * rendering/RenderBlock.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@20220 268f45cc-cd09-0410-ab3c-d52691b4dbfc