Bug 1606653 [wpt PR 20999] - Update wpt metadata, a=testonly

wpt-pr: 20999 wpt-type: metadata
2020-01-06 11:52:13 +00:00 · 2020-01-06 11:52:13 +00:00 · b91c5b27d0
--- a/testing/web-platform/meta/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html.ini
+++ b/testing/web-platform/meta/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html.ini
@ -0,0 +1,3 @@
+[remove-from-shadow-host-and-adopt-into-iframe.html]
+  expected:
+    if os == "win": FAIL