Prepare DedicatedWorker for per thread heap

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

Index: third_party/WebKit/Source/core/workers/WorkerBackingThread.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkerBackingThread.cpp b/third_party/WebKit/Source/core/workers/WorkerBackingThread.cpp
index d657279518e0124ef35fc55b6b85a892e2f49969..e81a7d6f159ae800be160a37e3a6ad3ea89feaf9 100644
--- a/third_party/WebKit/Source/core/workers/WorkerBackingThread.cpp
+++ b/third_party/WebKit/Source/core/workers/WorkerBackingThread.cpp
@@ -47,15 +47,15 @@ static void removeWorkerIsolate(v8::Isolate* isolate)
     isolates().remove(isolate);
 }
 
-WorkerBackingThread::WorkerBackingThread(const char* name, bool shouldCallGCOnShutdown)
-    : m_backingThread(WebThreadSupportingGC::create(name))
+WorkerBackingThread::WorkerBackingThread(const char* name, bool shouldCallGCOnShutdown, bool enablePerThreadHeap)
+    : m_backingThread(WebThreadSupportingGC::create(name, enablePerThreadHeap))
     , m_isOwningThread(true)
     , m_shouldCallGCOnShutdown(shouldCallGCOnShutdown)
 {
 }
 
 WorkerBackingThread::WorkerBackingThread(WebThread* thread, bool shouldCallGCOnShutdown)
-    : m_backingThread(WebThreadSupportingGC::createForThread(thread))
+    : m_backingThread(WebThreadSupportingGC::createForThread(thread, true))
     , m_isOwningThread(false)
     , m_shouldCallGCOnShutdown(shouldCallGCOnShutdown)
 {