CompositorWorker is now always on the heap.

Source/modules/compositorworker/CompositorWorker.h

Index: Source/modules/compositorworker/CompositorWorker.h
diff --git a/Source/modules/compositorworker/CompositorWorker.h b/Source/modules/compositorworker/CompositorWorker.h
index 15a2f1af46047b8286a6280310de091ab82a3cb7..49f8768859e2129b1dc2edd081cbd112bb6fc356 100644
--- a/Source/modules/compositorworker/CompositorWorker.h
+++ b/Source/modules/compositorworker/CompositorWorker.h
@@ -18,7 +18,7 @@ class WorkerGlobalScopeProxy;
 class CompositorWorker final : public InProcessWorkerBase {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<CompositorWorker> create(ExecutionContext*, const String& url, ExceptionState&);
+    static CompositorWorker* create(ExecutionContext*, const String& url, ExceptionState&);
     ~CompositorWorker() override;
 
     const AtomicString& interfaceName() const override;