Window Management test: Fullscreen Companion Window

third_party/blink/web_tests/external/wpt/window-management/multi-screen-fullscreen-companion.tentative.https.html

149.0.7827.2222 B

Tests use of multi-screen details to enter fullscreen and open a 'companion' popup window in the same user activation.
The host device must have 2+ screens to yield meaningful results.

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