Worker: Reduce use of ExecutionContextTask in core/workers

third_party/WebKit/Source/modules/time_zone_monitor/TimeZoneMonitorClient.cpp

 // 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.
 
 #include "modules/time_zone_monitor/TimeZoneMonitorClient.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8PerIsolateData.h"
 #include "core/dom/ExecutionContext.h"
-#include "core/dom/ExecutionContextTask.h"
 #include "core/workers/WorkerBackingThread.h"
+#include "core/workers/WorkerOrWorkletGlobalScope.h"
 #include "core/workers/WorkerThread.h"
+#include "platform/CrossThreadFunctional.h"
 #include "platform/ServiceConnector.h"
 #include "public/platform/Platform.h"
 #include "services/device/public/interfaces/constants.mojom-blink.h"
 #include "third_party/icu/source/i18n/unicode/timezone.h"
 #include <v8.h>
 
 namespace blink {
 
 namespace {
 
 // Notify V8 that the date/time configuration of the system might have changed.
 void NotifyTimezoneChangeToV8(v8::Isolate* isolate) {
   DCHECK(isolate);
   v8::Date::DateTimeConfigurationChangeNotification(isolate);
 }
 
-void NotifyTimezoneChangeOnWorkerThread(ExecutionContext* context) {
-  NotifyTimezoneChangeToV8(toIsolate(context));
+void NotifyTimezoneChangeOnWorkerThread(WorkerThread* workerThread) {
+  DCHECK(workerThread->isCurrentThread());
+  NotifyTimezoneChangeToV8(toIsolate(workerThread->globalScope()));
 }
 
 }  // namespace
 
 // static
 void TimeZoneMonitorClient::Init() {
   DEFINE_STATIC_LOCAL(TimeZoneMonitorClient, instance, ());
 
   device::mojom::blink::TimeZoneMonitorPtr monitor;
   ServiceConnector::instance().connectToInterface(
@@ skipping 20 matching lines @@
   NotifyTimezoneChangeToV8(V8PerIsolateData::mainThreadIsolate());
 
   HashSet<WorkerThread*>& threads = WorkerThread::workerThreads();
   HashSet<WorkerBackingThread*> posted;
   for (WorkerThread* thread : threads) {
     // Ensure every WorkerBackingThread(holding one platform thread) only get
     // the task posted once, because one WorkerBackingThread could be shared
     // among multiple WorkerThreads.
     if (posted.contains(&thread->workerBackingThread()))
       continue;
-    thread->postTask(BLINK_FROM_HERE, createCrossThreadTask(
-                                          &NotifyTimezoneChangeOnWorkerThread));
+    thread->postTask(BLINK_FROM_HERE,
+                     crossThreadBind(&NotifyTimezoneChangeOnWorkerThread,
+                                     WTF::crossThreadUnretained(thread)));
     posted.add(&thread->workerBackingThread());
   }
 }
 
 }  // namespace blink