Bug 1526514 [wpt PR 15203] - Update wpt metadata, a=testonly

wpt-pr: 15203 wpt-type: metadata
2019-02-11 20:44:49 +00:00 · 2019-02-11 20:44:49 +00:00 · 166f969758
--- a/testing/web-platform/meta/portals/portals-host-hidden-after-activation.html.ini
+++ b/testing/web-platform/meta/portals/portals-host-hidden-after-activation.html.ini
@ -0,0 +1,5 @@
+[portals-host-hidden-after-activation.html]
+  expected: TIMEOUT
+  [window.portalHost should be null after portal is activated]
+    expected: TIMEOUT
+