Invalid use of "find the topmost popover ancestor"

[theIDinside]

Recently a new PR was pulled in: Add popover=hint #9778

It adds another argument to the find the topmost popover ancestor:

1. a Node newPopoverOrTopLayerElement
2. a list popoverList <- this one
3. an HTML element or null invoker
4. a boolean isPopover

However, to fullscreen an element we are still only using the old three argument-version.

@josepharhar wrote the pull request for the new popover attribute value so I guess my question is what would be the parameter for the list in the Fullscreen API scenario? I'm not well versed in how popover works or is intended to work, but I take that the specific change for the PR is to add tooltip-like stuff, and so, I wonder, should all these be auto closed and only have the "manual" popovers left open or should it be auto? But that's just my initial guesses after having peaked at it for 5 minutes.

[lukewarlow]

PR to export the necessary definitions from HTML: whatwg/html#11140

[josepharhar]

Thanks luke!