been reviewed), so now this is also including that.

	The first layer fix was to deal with the yale.edu crasher.
	It involved making sure that append/remove of render object
	trees drill down into those trees to remove/append corresponding
	layers (instead of just checking the root of the trees).

	The second fix involves making sure that cliprects are right
	for painting backgrounds and borders of clipped objects.
	Fixes benoit's bug.

        Reviewed by: mjs and darin (fix 1), mjs and gramps (fix 2)

        * khtml/rendering/render_container.cpp:
        (RenderContainer::removeChildNode):
        (RenderContainer::appendChildNode):
        (RenderContainer::insertChildNode):
        * khtml/rendering/render_container.h:
        * khtml/rendering/render_layer.cpp:
        (RenderLayer::paint):
        (RenderLayer::constructZTree):
        * khtml/rendering/render_layer.h:
        * khtml/rendering/render_object.cpp:
        (RenderObject::appendLayers):
        (RenderObject::removeLayers):
        (RenderObject::enclosingLayer):
        * khtml/rendering/render_object.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2965 268f45cc-cd09-0410-ab3c-d52691b4dbfc