[Webkit-unassigned] [Bug 231506] Investigate `JSGlobalObject == JSDOMGlobalObject` WebCore assumption in presence of Shadow Realms

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231506

--- Comment #2 from Phillip Mates <pmates at igalia.com> ---
Yusuke, you raised this initially. Looking at `incumbentDOMWindow`, it doesn't seem to be used in api contexts that the shadow realm has access to. For example, in the derived JSDOMWindow.cpp, `incumbentDOMWindow` is used for `postMessage`, `closeBody`, `focusBody`, etc, which won't be exposed to the shadow realm global object.

Can you think of other areas we need to look out for, or perhaps this assumption isn't an issue?

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