Disable failed test network-filter-service-worker.js on Linux Tests

http/tests/devtools/network/network-filter-service-worker.js fails on
Linux Tests,
https://ci.chromium.org/p/chromium/builders/ci/
Linux%20Tests%20%28dbg%29%281%29/92362,
disable it for now until it is fixed.

TBR=tvanderlippe@chromium.org
NOTRY=True

Bug: 1140281
Change-Id: Iaa1cdd9b6ff12fa3911dcbec647aa57a17d8ee65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2486117Reviewed-by: Lan Wei <lanwei@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818718}

third_party/blink/web_tests/TestExpectations

@@ -5281,7 +5281,7 @@ crbug.com/835943 [ Release ] http/tests/appcache/non-html.xhtml [ Crash Pass Fai
 # Sheriff 2019-03-28
 crbug.com/946890 external/wpt/html/semantics/embedded-content/media-elements/location-of-the-media-resource/currentSrc.html [ Failure Pass Crash ]
 crbug.com/946714 [ Release ] http/tests/devtools/elements/styles-4/styles-live-locations-leak.js [ Pass Timeout ]
-crbug.com/946699 [ Release ] http/tests/devtools/network/network-filter-service-worker.js [ Pass Timeout ]
+crbug.com/946699 [ Release Linux ] http/tests/devtools/network/network-filter-service-worker.js [ Pass Timeout Failure ]
 crbug.com/946711 [ Release ] http/tests/devtools/editor/text-editor-search-switch-editor.js [ Crash Pass Timeout ]
 crbug.com/946712 [ Release ] http/tests/devtools/elements/styles-2/paste-property.js [ Crash Pass Timeout ]
 crbug.com/848799 [ Win7 ] http/tests/devtools/coverage/multiple-instances-merge.js [ Pass Timeout ]