[BackgroundFetch] Match IDL to spec.

The `updateUI`'s options parameter should be optional. No behavioral
changes are required.

Bug: 1000785
Change-Id: I0d84ce1e985911e8e0db16311678aa93d8db886e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1787281
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Auto-Submit: Rayan Kanso <rayankans@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693833}

third_party/blink/renderer/modules/background_fetch/background_fetch_update_ui_event.idl

@@ -9,5 +9,5 @@
     Exposed=ServiceWorker,
     RuntimeEnabled=BackgroundFetch
 ] interface BackgroundFetchUpdateUIEvent : BackgroundFetchEvent {
-    [CallWith=ScriptState] Promise<void> updateUI(BackgroundFetchUIOptions options);
+    [CallWith=ScriptState] Promise<void> updateUI(optional BackgroundFetchUIOptions options);
 };
\ No newline at end of file

third_party/blink/web_tests/external/wpt/background-fetch/idlharness.https.any.serviceworker-expected.txt

-This is a testharness.js-based test.
-Found 57 tests; 56 PASS, 1 FAIL, 0 TIMEOUT, 0 NOTRUN.
-PASS idl_test setup
-PASS Partial interface ServiceWorkerGlobalScope: original interface defined
-PASS Partial interface ServiceWorkerRegistration: original interface defined
-PASS BackgroundFetchManager interface: existence and properties of interface object
-PASS BackgroundFetchManager interface object length
-PASS BackgroundFetchManager interface object name
-PASS BackgroundFetchManager interface: existence and properties of interface prototype object
-PASS BackgroundFetchManager interface: existence and properties of interface prototype object's "constructor" property
-PASS BackgroundFetchManager interface: existence and properties of interface prototype object's @@unscopables property
-PASS BackgroundFetchManager interface: operation fetch(DOMString, [object Object],[object Object], BackgroundFetchOptions)
-PASS BackgroundFetchManager interface: operation get(DOMString)
-PASS BackgroundFetchManager interface: operation getIds()
-PASS BackgroundFetchRegistration interface: existence and properties of interface object
-PASS BackgroundFetchRegistration interface object length
-PASS BackgroundFetchRegistration interface object name
-PASS BackgroundFetchRegistration interface: existence and properties of interface prototype object
-PASS BackgroundFetchRegistration interface: existence and properties of interface prototype object's "constructor" property
-PASS BackgroundFetchRegistration interface: existence and properties of interface prototype object's @@unscopables property
-PASS BackgroundFetchRegistration interface: attribute id
-PASS BackgroundFetchRegistration interface: attribute uploadTotal
-PASS BackgroundFetchRegistration interface: attribute uploaded
-PASS BackgroundFetchRegistration interface: attribute downloadTotal
-PASS BackgroundFetchRegistration interface: attribute downloaded
-PASS BackgroundFetchRegistration interface: attribute result
-PASS BackgroundFetchRegistration interface: attribute failureReason
-PASS BackgroundFetchRegistration interface: attribute recordsAvailable
-PASS BackgroundFetchRegistration interface: attribute onprogress
-PASS BackgroundFetchRegistration interface: operation abort()
-PASS BackgroundFetchRegistration interface: operation match(RequestInfo, CacheQueryOptions)
-PASS BackgroundFetchRegistration interface: operation matchAll(RequestInfo, CacheQueryOptions)
-PASS BackgroundFetchRecord interface: existence and properties of interface object
-PASS BackgroundFetchRecord interface object length
-PASS BackgroundFetchRecord interface object name
-PASS BackgroundFetchRecord interface: existence and properties of interface prototype object
-PASS BackgroundFetchRecord interface: existence and properties of interface prototype object's "constructor" property
-PASS BackgroundFetchRecord interface: existence and properties of interface prototype object's @@unscopables property
-PASS BackgroundFetchRecord interface: attribute request
-PASS BackgroundFetchRecord interface: attribute responseReady
-PASS BackgroundFetchEvent interface: existence and properties of interface object
-PASS BackgroundFetchEvent interface object length
-PASS BackgroundFetchEvent interface object name
-PASS BackgroundFetchEvent interface: existence and properties of interface prototype object
-PASS BackgroundFetchEvent interface: existence and properties of interface prototype object's "constructor" property
-PASS BackgroundFetchEvent interface: existence and properties of interface prototype object's @@unscopables property
-PASS BackgroundFetchEvent interface: attribute registration
-PASS BackgroundFetchUpdateUIEvent interface: existence and properties of interface object
-PASS BackgroundFetchUpdateUIEvent interface object length
-PASS BackgroundFetchUpdateUIEvent interface object name
-PASS BackgroundFetchUpdateUIEvent interface: existence and properties of interface prototype object
-PASS BackgroundFetchUpdateUIEvent interface: existence and properties of interface prototype object's "constructor" property
-PASS BackgroundFetchUpdateUIEvent interface: existence and properties of interface prototype object's @@unscopables property
-FAIL BackgroundFetchUpdateUIEvent interface: operation updateUI(BackgroundFetchUIOptions) assert_equals: property has wrong .length expected 0 but got 1
-PASS ServiceWorkerRegistration interface: attribute backgroundFetch
-PASS ServiceWorkerGlobalScope interface: attribute onbackgroundfetchsuccess
-PASS ServiceWorkerGlobalScope interface: attribute onbackgroundfetchfail
-PASS ServiceWorkerGlobalScope interface: attribute onbackgroundfetchabort
-PASS ServiceWorkerGlobalScope interface: attribute onbackgroundfetchclick
-Harness: the test ran to completion.
-