ServiceWorker: Mojofication of EWInstance::StopWorker

content/common/service_worker/embedded_worker.mojom

 // Copyright 2016 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.
 
 module content.mojom;
 
 import "content/public/common/web_preferences.mojom";
 import "services/shell/public/interfaces/interface_provider.mojom";
 import "url/mojo/url.mojom";
 
 struct EmbeddedWorkerSettings {
   V8CacheOptions v8_cache_options;
   bool data_saver_enabled;
 };
 
 struct EmbeddedWorkerStartWorkerParams {
   int32 embedded_worker_id;
   int64 service_worker_version_id;
   url.mojom.Url scope;
   url.mojom.Url script_url;
   int32 worker_devtools_agent_route_id;
   bool pause_after_download;
   bool wait_for_debugger;
   bool is_installed;
   EmbeddedWorkerSettings settings;
 };
 
 interface EmbeddedWorkerInstanceClient {
   StartWorker(EmbeddedWorkerStartWorkerParams params);
+  StopWorker() => ();
 };