Mark http/tests/serviceworker/fetch-event-network-error.html as crashy.
Mark http/tests/serviceworker/fetch-event-network-error.html as crashy.

BUG=596703
TBR=kinuko@chromium.org,

Review URL: https://codereview.chromium.org/1817403002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#382483}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk