Update Background Fetch IDLs following spec changes

third_party/WebKit/Source/modules/background_fetch/BackgroundFetchSettledRequest.idl

Index: third_party/WebKit/Source/modules/background_fetch/BackgroundFetchSettledRequest.idl
diff --git a/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchSettledRequest.idl b/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchSettledRequest.idl
deleted file mode 100644
index ae2a7f151aa3733c882dea76d2e919125af6cd0a..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchSettledRequest.idl
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// https://wicg.github.io/background-fetch/#backgroundfetchsettledfetches
-// TODO(peter): Update either the above link or the name of this interface based
-// on the outcome of https://github.com/WICG/background-fetch/issues/32.
-
-[
-    Constructor(Request request, Response response),
-    Exposed=ServiceWorker,
-    RuntimeEnabled=BackgroundFetch
-] interface BackgroundFetchSettledRequest : BackgroundFetchRequest {
-    readonly attribute Response? response;
-};