Add ref count to service workers for extension API.

extensions/renderer/worker_thread_dispatcher.h

Index: extensions/renderer/worker_thread_dispatcher.h
diff --git a/extensions/renderer/worker_thread_dispatcher.h b/extensions/renderer/worker_thread_dispatcher.h
index 4a93011ddd3f950c33c560310aca4164dd868a5f..da8946a586af5a0baefee8d2d0c87d816360b3d2 100644
--- a/extensions/renderer/worker_thread_dispatcher.h
+++ b/extensions/renderer/worker_thread_dispatcher.h
@@ -19,6 +19,7 @@ class RenderThread;
 
 namespace extensions {
 class RequestSender;
+class ServiceWorkerRequestSender;
 class V8SchemaRegistry;
 
 // Sends and receives IPC in an extension Service Worker.
@@ -34,12 +35,12 @@ class WorkerThreadDispatcher : public content::RenderThreadObserver {
 
   // Thread safe.
   static WorkerThreadDispatcher* Get();
-  static RequestSender* GetRequestSender();
+  static ServiceWorkerRequestSender* GetRequestSender();
 
   void Init(content::RenderThread* render_thread);
   bool Send(IPC::Message* message);
-  void AddWorkerData(int embedded_worker_id);
-  void RemoveWorkerData(int embedded_worker_id);
+  void AddWorkerData(int64_t service_worker_version_id);
+  void RemoveWorkerData(int64_t service_worker_version_id);
   V8SchemaRegistry* GetV8SchemaRegistry();
 
  private: