Prepare DedicatedWorker for per thread heap

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

Index: third_party/WebKit/Source/core/workers/WorkerBackingThread.h
diff --git a/third_party/WebKit/Source/core/workers/WorkerBackingThread.h b/third_party/WebKit/Source/core/workers/WorkerBackingThread.h
index c47a3ac402232c12f458a52bc08f9f741512da9e..d4f1efe0ea9dcb9296a8784ba8ac785f596310d9 100644
--- a/third_party/WebKit/Source/core/workers/WorkerBackingThread.h
+++ b/third_party/WebKit/Source/core/workers/WorkerBackingThread.h
@@ -6,6 +6,7 @@
 #define WorkerBackingThread_h
 
 #include "core/CoreExport.h"
+#include "platform/heap/ThreadState.h"
 #include "wtf/Forward.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/ThreadingPrimitives.h"
@@ -27,12 +28,12 @@ class WebThreadSupportingGC;
 // WorkerGlobalScopes) can share one WorkerBackingThread.
 class CORE_EXPORT WorkerBackingThread final {
 public:
-    static std::unique_ptr<WorkerBackingThread> create(const char* name) { return wrapUnique(new WorkerBackingThread(name, false)); }
+    static std::unique_ptr<WorkerBackingThread> create(const char* name, BlinkGC::ThreadHeapMode threadHeapMode) { return wrapUnique(new WorkerBackingThread(name, false, threadHeapMode)); }
     static std::unique_ptr<WorkerBackingThread> create(WebThread* thread) { return wrapUnique(new WorkerBackingThread(thread, false)); }
 
     // These are needed to suppress leak reports. See
     // https://crbug.com/590802 and https://crbug.com/v8/1428.
-    static std::unique_ptr<WorkerBackingThread> createForTest(const char* name) { return wrapUnique(new WorkerBackingThread(name, true)); }
+    static std::unique_ptr<WorkerBackingThread> createForTest(const char* name, BlinkGC::ThreadHeapMode threadHeapMode) { return wrapUnique(new WorkerBackingThread(name, true, threadHeapMode)); }
     static std::unique_ptr<WorkerBackingThread> createForTest(WebThread* thread) { return wrapUnique(new WorkerBackingThread(thread, true)); }
 
     ~WorkerBackingThread();
@@ -58,7 +59,7 @@ public:
     static void setRAILModeOnWorkerThreadIsolates(v8::RAILMode);
 
 private:
-    WorkerBackingThread(const char* name, bool shouldCallGCOnShutdown);
+    WorkerBackingThread(const char* name, bool shouldCallGCOnShutdown, BlinkGC::ThreadHeapMode);
     WorkerBackingThread(WebThread*, bool shouldCallGCOnSHutdown);
 
     std::unique_ptr<WebThreadSupportingGC> m_backingThread;