Adding TE-NeedsTriageHelp to move this out of TE unconfirmed triaging queue.

No need of TE-triaging.

rakuco, feel free to take this one, too, if you're interested in.

html/browsers/the-window-object/window-indexed-properties.html is being fixed as a side-effect of https://chromium-review.googlesource.com/c/576183

html/browsers/origin/cross-origin-objects/cross-origin-objects.html is quite similar and could perhaps even be fixed in the same CL, it's a matter of adjusting the descriptors for the cross-origin case as well.

FWIW, https://chromium-review.googlesource.com/c/576183 landed yesterday, so there's currently only html/browsers/origin/cross-origin-objects/cross-origin-objects.html left to fix.