Import w3c tests for the service workers

third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/fetch-event.https-expected.txt

Index: third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/fetch-event.https-expected.txt
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/fetch-event.https-expected.txt b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/fetch-event.https-expected.txt
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+This is a testharness.js-based test.
+PASS Service Worker responds to fetch event with string 
+PASS Service Worker responds to fetch event with blob body 
+PASS Service Worker responds to fetch event with the referrer URL 
+FAIL Service Worker responds to fetch event with the referrer URL assert_unreached: unexpected rejection: assert_equals: Service Worker should respond to fetch with the referrer URL when a member of RequestInit is present expected "Referrer: https://web-platform.test:8444/service-workers/service-worker/resources/simple.html?referrerPolicy\nReferrerPolicy: no-referrer-when-downgrade" but got "Referrer: https://web-platform.test:8444/service-workers/service-worker/resources/undefined\nReferrerPolicy: no-referrer-when-downgrade" Reached unreachable code
+PASS Service Worker responds to fetch event with an existing client id 
+PASS Service Worker does not respond to fetch event 
+PASS Service Worker responds to fetch event with null response body 
+PASS Service Worker fetches other file in fetch event 
+PASS Service Worker responds to fetch event with POST form 
+PASS Multiple calls of respondWith must throw InvalidStateErrors 
+PASS Service Worker event.respondWith must set the used flag 
+PASS Service Worker must not expose FetchEvent URL fragments. 
+FAIL Service Worker responds to fetch event with the correct cache types assert_unreached: unexpected rejection: assert_equals: expected "default" but got "" Reached unreachable code
+FAIL Service Worker should intercept EventSource assert_unreached: unexpected rejection: assert_equals: EventSource should bypass the http cache. expected (string) "no-store" but got (undefined) undefined Reached unreachable code
+PASS Service Worker responds to fetch event with the correct integrity_metadata 
+Harness: the test ran to completion.
+