Bug 1467168 [wpt PR 11358] - Make fetch-event.https.html faster., a=testonly

Automatic update from web-platform-testsMake fetch-event.https.html faster.

It was registering a service worker for each test case, and had a lot
of test cases.

This changes the file to register a single service worker at the
beginning, and unregister it at the end.

Bug: 847787
Change-Id: Ic2536824a3c57e86bb5e042287e9e62e6222ad9a
Reviewed-on: https://chromium-review.googlesource.com/1087188
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564770}

--

wpt-commits: d3f16722cc61d5e606e82f84c03e6c344d70b4ba
wpt-pr: 11358

testing/web-platform/meta/MANIFEST.json

@@ -609444,7 +609444,7 @@
    "testharness"
   ],
   "service-workers/service-worker/fetch-event.https.html": [
-   "dfd8525f82292cc3728cc3b1afb2a14e19ef4b43",
+   "d4ff864f1d5a7896cc748cd4abe10d08c0fb08f9",
    "testharness"
   ],
   "service-workers/service-worker/fetch-frame-resource.https.html": [