This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
"Component confinement is much trickier. Perhaps it needs to be tackled as a separate effort." Using a pair of corruptible/incorruptible objects, one being a worker/iframe.
http://dvcs.w3.org/hg/webcomponents/rev/71369e6512bf