Removing "creator browsing context"

[annevk]

In https://github.com/whatwg/html/tree/creator-document-wip I've stored some work in progress with the aim of making "creator browsing context" part of "creating a new browsing context". That seems like the right solution and will also help with solving #1445 eventually I think.

However, two bits are problematic at the moment:

• creator base URL (suspect that this requires solving Revamp about:blank and about:srcdoc iframe/popup base URL inheritance #421)
• creator context security (added in Add 'creator context security'. #1561 by @mikewest)

It seems creator context security might be the wrong thing as https://w3c.github.io/webappsec-secure-contexts/ tries to obtain it from a document rather than a browsing context...

[mikewest]

It seems creator context security might be the wrong thing as https://w3c.github.io/webappsec-secure-contexts/ tries to obtain it from a document rather than a browsing context...

I'm happy to do this in some other way. How would you like it to work?

[annevk]

@mikewest it seems you just want to propagate state to the created document, right? And probably also do that for non-initial about:blank and srcdoc and blob and such? I think we should just move this state to the document then and propagate it as appropriate.

[gsnedders]

The current spec never really defines when the "creator browsing context" is passed to "create a new browsing context", and "creator browsing context" is never actually referenced outside of "create a new browsing context".