A lot of shadow dom tests have been skipped except chromium port, because SHADOW_DOM flag is not enabled in non-chromium ports. However, we can use a adapter method defined in polyfill.js to use 'new WebKitShadowRoot'. Maybe we can also define some internals method to add multiple shadow subtrees. If we add some internals method to add multiple shadow subtrees, we can remove a lot of tests from Skipped list.
rniwa@webkit.org - Is it something we needed or since Webkit is already going toward Shadow DOM v1 implementation slowly, we can mark this as "RESOLVED WONTFIX" and focus on actual implementation because it seems to be about "polypill" (stop gap) solution.
Yeah, this is won't at this point. We have a sufficient test coverage of v1 API everywhere now.