This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
https://dvcs.w3.org/hg/webcomponents/raw-file/tip/explainer/index.html#making-more-shadows still uses: var shadow = new ShadowRoot(anyElement);
Fixed in <https://dvcs.w3.org/hg/webcomponents/rev/302fae8e9e69>