Add commandline flag for ServiceWroker in the renderer process.

content/public/browser/worker_service.h

Index: content/public/browser/worker_service.h
diff --git a/content/public/browser/worker_service.h b/content/public/browser/worker_service.h
index 7ce2bf4ec1fd7e52ec36bd576a2cad7652ce188f..83a8bd83e0cb859d66288dc8eb273682488a2490 100644
--- a/content/public/browser/worker_service.h
+++ b/content/public/browser/worker_service.h
@@ -26,6 +26,9 @@ class WorkerService {
   // Returns the WorkerService singleton.
   CONTENT_EXPORT static WorkerService* GetInstance();
 
+  // Determines whether embedded SharedWorker is enabled.
+  CONTENT_EXPORT static bool EmbeddedSharedWorkerEnabled();
+
   // Terminates the given worker. Returns true if the process was found.
   virtual bool TerminateWorker(int process_id, int route_id) = 0;