Disallow Atomics.wait in ServiceWorker, allow in SharedWorker

third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 315 matching lines @@
       WTF::WrapUnique(client_->CreateWorkerContentSettingsClientProxy(
           web_security_origin)));
   ProvideIndexedDBClientToWorker(worker_clients,
                                  IndexedDBClientImpl::Create(*worker_clients));
   ContentSecurityPolicy* content_security_policy =
       main_script_loader_->ReleaseContentSecurityPolicy();
   WorkerThreadStartMode start_mode =
       worker_inspector_proxy_->WorkerStartMode(document);
   std::unique_ptr<WorkerSettings> worker_settings =
       WTF::WrapUnique(new WorkerSettings(document->GetSettings()));
+  WorkerV8Settings worker_v8_settings = WorkerV8Settings::Default();
+  worker_v8_settings.atomics_wait_mode_ =
+      WorkerV8Settings::AtomicsWaitMode::kAllow;
   std::unique_ptr<WorkerThreadStartupData> startup_data =
       WorkerThreadStartupData::Create(
           url_, loading_document_->UserAgent(),
           main_script_loader_->SourceText(), nullptr, start_mode,
           content_security_policy ? content_security_policy->Headers().get()
                                   : nullptr,
           main_script_loader_->GetReferrerPolicy(), starter_origin,
           worker_clients, main_script_loader_->ResponseAddressSpace(),
           main_script_loader_->OriginTrialTokens(), std::move(worker_settings),
-          WorkerV8Settings::Default());
+          worker_v8_settings);
 
   // SharedWorker can sometimes run tasks that are initiated by/associated with
   // a document's frame but these documents can be from a different process. So
   // we intentionally populate the task runners with null document in order to
   // use the thread's default task runner. Note that |m_document| should not be
   // used as it's a dummy document for loading that doesn't represent the frame
   // of any associated document.
   ParentFrameTaskRunners* task_runners =
       ParentFrameTaskRunners::Create(nullptr);
 
@@ skipping 52 matching lines @@
   if (devtools_agent)
     devtools_agent->DispatchOnInspectorBackend(session_id, call_id, method,
                                                message);
 }
 
 WebSharedWorker* WebSharedWorker::Create(WebSharedWorkerClient* client) {
   return new WebSharedWorkerImpl(client);
 }
 
 }  // namespace blink