- fix http://bugzilla.opendarwin.org/show_bug.cgi?id=6821
           Fix for 5983 will not always update hover correctly.
 
         * khtml/xml/DocumentImpl.cpp:
         (WebCore::DocumentImpl::hoveredNodeDetached): Added this method. Moved the hover logic from
         NodeImpl::detach here, modified to use the DOM tree instead of hoverAncestor,
         to handle the case that the hover node is a text node, and to schedule an update
         of hover state.
         (WebCore::DocumentImpl::activeChainNodeDetached): Added this method to trim the
         active chain above the node being detached.
         * khtml/xml/DocumentImpl.h:
         * khtml/xml/NodeImpl.cpp:
         (WebCore::NodeImpl::detach): Moved most of the hover logic out of here into
         DocumentImpl. Reset m_active and m_inActiveChain and call activeChainNodeDetached
         when detaching an active node. 
         * manual-tests/bugzilla-6821.html: Added.
         * page/FrameView.cpp:
         (WebCore::FrameViewPrivate::FrameViewPrivate): Added hover-state update timer.
         (WebCore::FrameViewPrivate::reset):
         (WebCore::FrameView::~FrameView):
         (WebCore::FrameView::viewportMouseMoveEvent):
         (WebCore::FrameView::hoverTimerFired): Call DocumentImpl::prepareMouseEvent
         when the timer fires to cause hover state to update.
         (WebCore::FrameView::scheduleHoverStateUpdate): Added.
         * page/FrameView.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@12756 268f45cc-cd09-0410-ab3c-d52691b4dbfc