Bug 1480724 [wpt PR 12293] - Update wpt metadata, a=testonly

wpt-pr: 12293 wpt-type: metadata
2018-08-03 12:17:36 +00:00 · 2018-08-03 12:17:36 +00:00 · 92effa16a5
--- a/testing/web-platform/meta/workers/WorkerGlobalScope_requestAnimationFrame.tentative.worker.js.ini
+++ b/testing/web-platform/meta/workers/WorkerGlobalScope_requestAnimationFrame.tentative.worker.js.ini
@ -0,0 +1,4 @@
+[WorkerGlobalScope_requestAnimationFrame.tentative.worker.html]
+  [WorkerGlobalScope_requestAnimationFrame]
+    expected: FAIL
+