[Flaky][Linux][MSAN] Mark more idlharness tests flaky

Marking some idlharness tests flaky as they have been the main point of
failure on a significant amount of Linux tests.

Tbr: mgiuca@chromium.org
Bug: 873045
Change-Id: I798aeeadde74b34b458b8d05862dde5535a37d41
Reviewed-on: https://chromium-review.googlesource.com/1179750Reviewed-by: Friedrich Horschig <fhorschig@chromium.org>
Commit-Queue: Friedrich Horschig <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584033}

third_party/WebKit/LayoutTests/MSANExpectations

@@ -133,7 +133,7 @@ crbug.com/856601 [ Linux ] external/wpt/encrypted-media/idlharness.https.html [
 crbug.com/856601 [ Linux ] external/wpt/fetch/cors-rfc1918/idlharness.tentative.any.worker.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/mediacapture-image/idlharness.window.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/mediacapture-streams/idlharness.https.window.html [ Pass Timeout ]
-crbug.com/856601 [ Linux ] external/wpt/notifications/idlharness.https.any.html [ Pass Timeout ]
+crbug.com/856601 [ Linux ] external/wpt/notifications/idlharness.https.any.html [ Pass Failure Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/pointerevents/idlharness.window.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/presentation-api/controlling-ua/idlharness.https.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/push-api/idlharness.https.any.html [ Pass Timeout ]
@@ -157,13 +157,13 @@ crbug.com/856601 [ Linux ] virtual/outofblink-cors-ns/external/wpt/service-worke
 crbug.com/856601 [ Linux ] virtual/outofblink-cors/external/wpt/fetch/cors-rfc1918/idlharness.tentative.https.any.serviceworker.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] virtual/outofblink-cors/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout Pass ]
 crbug.com/856601 [ Linux ] virtual/service-worker-servicification/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout Pass ]
-crbug.com/856601 [ Linux ] virtual/video-surface-layer/external/wpt/picture-in-picture/idlharness.window.html [ Pass Timeout ]
+crbug.com/856601 [ Linux ] virtual/video-surface-layer/external/wpt/picture-in-picture/idlharness.window.html [ Pass Failure Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/fetch/api/idl.any.sharedworker.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/fetch/cors-rfc1918/idlharness.tentative.https.any.serviceworker.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/media-capabilities/idlharness.any.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/orientation-event/idlharness.window.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/pointerlock/interfaces.window.html [ Pass Timeout ]
-crbug.com/856601 [ Linux ] virtual/outofblink-cors-ns/external/wpt/xhr/idlharness.any.worker.html [ Pass Timeout ]
+crbug.com/856601 [ Linux ] virtual/outofblink-cors-ns/external/wpt/xhr/idlharness.any.worker.html [ Pass Failure Timeout ]
 crbug.com/856601 [ Linux ] virtual/outofblink-cors/external/wpt/xhr/idlharness.any.sharedworker.html [ Pass Timeout ]
 crbug.com/856601 [ Linux ] external/wpt/bluetooth/idl/idlharness.tentative.https.window.html [ Timeout Pass ]
 crbug.com/856601 [ Linux ] external/wpt/css/css-pseudo/idlharness.html [ Timeout Pass ]
@@ -183,3 +183,10 @@ crbug.com/869818 [ Linux ] external/wpt/background-fetch/get.https.window.html [
 crbug.com/869818 [ Linux ] external/wpt/background-fetch/mixed-content-and-allowed-schemes.https.window.html [ Pass Crash ]
 crbug.com/869818 [ Linux ] external/wpt/background-fetch/port-blocking.https.window.html [ Pass Crash ]
 crbug.com/869818 [ Linux ] http/tests/background_fetch/block-cors-preflights.https.html [ Pass Crash ]
+
+# Disabled by sheriff due to repeated flakes
+crbug.com/873045 [ Linux ] external/wpt/WebCryptoAPI/idlharness.https.any.worker.html [ Pass Failure Timeout ]
+# Also flaking according to crbug.com/873045 but mentioned in existing entries above:
+# external/wpt/picture-in-picture/idlharness.window.html
+# external/wpt/notifications/idlharness.https.any.worker.html
+# external/wpt/xhr/idlharness.any.worker.html