[Chrome] Updates for Shadow DOM.

[jpmedley]

CustomElementRegistry

• Sort support nodes
• Shorten description of building
• Add Chrome support for upgrade

DocumentOrShadowRoot

• Sort members and support nodes

ShadowRoot

• Sort members and support nodes
• Add delegatesFocus

[Elchi3]

Thank you! 👍

[sideshowbarker]

I notice that https://developer.mozilla.org/docs/Web/API/DocumentOrShadowRoot/adoptedStyleSheets doesn’t exist yet — which is fine and I guess you’re already aware of — but since we don’t (yet) have any way to specify associated spec URLs in BCD (as discussed in #1531), I just want to note that very few other people looking at this data are likely to yet have any idea where DocumentOrShadowRoot: adoptedStyleSheets is actually specified (which is in the WICG Constructable Stylesheet Objects proposal).

To be clear: I’m not saying we shouldn’t add stuff like that to BCD — I think it’s fine — I’m just taking the opportunity to say, Gee wouldn’t it be great if when we did, we had a key in the BCD itself to indicate the associated spec.

cc @Elchi3

[Elchi3]

I agree, lets add spec urls soon. :-)