Prepare DedicatedWorker for per thread heap

third_party/WebKit/Source/core/workers/WorkerThreadTestHelper.h

Index: third_party/WebKit/Source/core/workers/WorkerThreadTestHelper.h
diff --git a/third_party/WebKit/Source/core/workers/WorkerThreadTestHelper.h b/third_party/WebKit/Source/core/workers/WorkerThreadTestHelper.h
index 017b9229271ca448029d7e5a22d0766a3916a94d..178dca58d0687c36482cff01c87098925c679992 100644
--- a/third_party/WebKit/Source/core/workers/WorkerThreadTestHelper.h
+++ b/third_party/WebKit/Source/core/workers/WorkerThreadTestHelper.h
@@ -100,9 +100,10 @@ class WorkerThreadForTest : public WorkerThread {
 public:
     WorkerThreadForTest(
         WorkerLoaderProxyProvider* mockWorkerLoaderProxyProvider,
-        WorkerReportingProxy& mockWorkerReportingProxy)
+        WorkerReportingProxy& mockWorkerReportingProxy,
+        BlinkGC::ThreadHeapMode threadHeapMode)
         : WorkerThread(WorkerLoaderProxy::create(mockWorkerLoaderProxyProvider), mockWorkerReportingProxy)
-        , m_workerBackingThread(WorkerBackingThread::createForTest("Test thread"))
+        , m_workerBackingThread(WorkerBackingThread::createForTest("Test thread", threadHeapMode))
     {
     }