Add hooks to inform WebDriver BiDi when a navigable is created or destroyed

[OrKoN]

Currently, WebDriver BiDi spec patches the HTML spec to define when WebDriver BiDi algorithms take place. This PR updates the HTML spec to explicitly invoke WebDriver BiDI algorithms. Note that WebDriver BiDi spec is still not up-to-date w.r.t the use of browsing context vs navigable and current browsing context mentions actually have to be navigables in most cases.

Corresponding WebDriver BiDi change: w3c/webdriver-bidi#708

• At least two implementers are interested (and none opposed):
  • The feature has been implemented in Chrome and Firefox
• Tests are written and can be reviewed and commented upon at:
  • https://github.com/web-platform-tests/wpt/tree/master/webdriver/tests/bidi/browsing_context
• Implementation bugs are filed:
  • N/A. Implementation has already happened in Chrome and Firefox and the change only refactors specifications for explicit integration.
• MDN issue is filed: N/A
• The top of this comment includes a clear commit message to use.

Closes #6194

---

/document-sequences.html ( diff )
/infrastructure.html ( diff )

[jgraham]

I think this is broadly correct from a WebDriver point of view i.e. it looks like the WebDriver BiDi algorithms are invoked for the right kind of places (but I'm not sure I could tell if the exact point in the algorithms where they're called is correct).

[OrKoN]

@foolip could you please take a look?

[domenic]

Can you make sure the result builds before you request review?

[OrKoN]

@domenic it has dependencies on WebDriver BiDi spec (that causes failures) that need to land first, but reviewers in the WebDriver BiDi spec would like to get a preliminary signal here first before landing changes there. Is there a way to suppress the errors to generate a preview without link?

[domenic]

HTML does not automatically pick up links from other specs. You need to add them using https://github.com/whatwg/wattsi/blob/main/Syntax.md#cross-specification-cross-references . That will fix the build error.

[OrKoN]

@domenic thanks, the preview is fixed now! (I have no permissions to run the build step)

[OrKoN]

@domenic @foolip could you provide any feedback on this PR or suggest who might be a good reviewer for it?