Move Cache Storage API implementation to modules/cachestorage

Source/modules/serviceworkers/Cache.idl

-// Copyright 2014 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.
-
-// See https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache
-
-[
-    GarbageCollected,
-    Exposed=(Window,Worker),
-    RuntimeEnabled=ServiceWorkerCache,
-    TypeChecking=Interface,
-] interface Cache {
-    [CallWith=ScriptState, RaisesException] Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
-
-    // FIXME: Implement matchAll(): http://crbug.com/428363
-    // FIXME: First argument of matchAll() should be optional: http://crbug.com/425459
-    // [CallWith=ScriptState, RaisesException] Promise<sequence<Response>> matchAll(RequestInfo request, optional CacheQueryOptions options);
-
-    // FIXME: Implement add(): http://crbug.com/427652
-    // [CallWith=ScriptState, RaisesException] Promise<void> add(RequestInfo request);
-
-    // FIXME: Implement addAll(): http://crbug.com/427652
-    // [CallWith=ScriptState] Promise<void> addAll(sequence<RequestInfo> requests);
-
-    [CallWith=ScriptState, RaisesException] Promise<void> put(RequestInfo request, Response response);
-    [CallWith=ScriptState, ImplementedAs=deleteFunction, RaisesException] Promise<boolean> delete(RequestInfo request, optional CacheQueryOptions options);
-    [CallWith=ScriptState, RaisesException] Promise<sequence<Response>> keys(optional RequestInfo request, optional CacheQueryOptions options);
-};