[Sheriff] Mark 3 service-worker layout tests as Timeout on Linux.

TBR=foolip@chromium.org

Bug: 866965
Change-Id: If4b3f8c350b4677490f2ad72d47d12437d82c77d
Reviewed-on: https://chromium-review.googlesource.com/1148659Reviewed-by: Derek Cheng <imcheng@chromium.org>
Commit-Queue: Derek Cheng <imcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577627}

third_party/WebKit/LayoutTests/TestExpectations

@@ -4677,3 +4677,8 @@ crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/canvas-blending-pattern-o
 crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/canvas-blending-pattern-over-image.html [ Pass Timeout ]
 crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/color-space/canvas-createImageBitmap-p3.html [ Pass Timeout ]
 crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/color-space/canvas-createImageBitmap-rec2020.html [ Pass Timeout ]
+
+# Sheriff 2018-07-24
+crbug.com/866965 [ Linux ] virtual/outofblink-cors-ns/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout ]
+crbug.com/866965 [ Linux ] virtual/outofblink-cors/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout ]
+crbug.com/866965 [ Linux ] virtual/service-worker-servicification/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout ]