Prepare DedicatedWorker for per thread heap

third_party/WebKit/Source/modules/serviceworkers/ServiceWorkerThread.cpp

 /*
  * Copyright (C) 2013 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 27 matching lines @@
 
 namespace blink {
 
 std::unique_ptr<ServiceWorkerThread> ServiceWorkerThread::create(PassRefPtr<WorkerLoaderProxy> workerLoaderProxy, WorkerReportingProxy& workerReportingProxy)
 {
     return wrapUnique(new ServiceWorkerThread(std::move(workerLoaderProxy), workerReportingProxy));
 }
 
 ServiceWorkerThread::ServiceWorkerThread(PassRefPtr<WorkerLoaderProxy> workerLoaderProxy, WorkerReportingProxy& workerReportingProxy)
     : WorkerThread(std::move(workerLoaderProxy), workerReportingProxy)
-    , m_workerBackingThread(WorkerBackingThread::create("ServiceWorker Thread"))
+    , m_workerBackingThread(WorkerBackingThread::create("ServiceWorker Thread", BlinkGC::MainThreadHeapMode))
 {
 }
 
 ServiceWorkerThread::~ServiceWorkerThread()
 {
 }
 
 void ServiceWorkerThread::clearWorkerBackingThread()
 {
     m_workerBackingThread = nullptr;
 }
 
 WorkerOrWorkletGlobalScope* ServiceWorkerThread::createWorkerGlobalScope(std::unique_ptr<WorkerThreadStartupData> startupData)
 {
     return ServiceWorkerGlobalScope::create(this, std::move(startupData));
 }
 
 } // namespace blink