Add test expectations for some new tests that cannot be rebaselined

The tests have unstable failure messages. Add these expectations in
advance to unblock wpt-importer.

TBR=kereliuk

No-Try: True
Bug: 832071
Change-Id: I4a1efcd869f3660f4a88d37e9a02bf4bc9f0ee40
Reviewed-on: https://chromium-review.googlesource.com/1010243
Commit-Queue: Robert Ma <robertma@chromium.org>
Reviewed-by: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550178}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2293,6 +2293,11 @@ crbug.com/829567 [ Linux Win ] fast/events/touch/scroll-without-mouse-lacks-mous
 crbug.com/829567 [ Linux Win ] virtual/mouseevent_fractional/fast/events/touch/scroll-without-mouse-lacks-mousemove-events.html [ Pass Failure ]
 crbug.com/829567 [ Linux Win ] virtual/scroll_customization/fast/events/touch/scroll-without-mouse-lacks-mousemove-events.html [ Pass Failure ]
 
+# Failure messages are unstable so we cannot create baselines.
+crbug.com/832071 external/wpt/service-workers/service-worker/worker-client-id.https.html [ Failure ]
+crbug.com/832071 virtual/navigation-mojo-response/external/wpt/service-workers/service-worker/worker-client-id.https.html [ Failure ]
+crbug.com/832071 virtual/outofblink-cors/external/wpt/service-workers/service-worker/worker-client-id.https.html [ Failure ]
+
 # ====== New tests from wpt-importer added here ======
 crbug.com/626703 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/ib-split/remove-from-split-inline-6.html [ Failure ]
 crbug.com/626703 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/ib-split/split-inner-inline-2.html [ Failure ]