Introduce worker_devtools_agent_route_id for EmbeddedWorker.

content/renderer/service_worker/embedded_worker_dispatcher.h

Index: content/renderer/service_worker/embedded_worker_dispatcher.h
diff --git a/content/renderer/service_worker/embedded_worker_dispatcher.h b/content/renderer/service_worker/embedded_worker_dispatcher.h
index 0ef1afde25a7438acf0a787c1b2825f20acffa51..deb177eceee097f2003b86394303f04a2a1be20a 100644
--- a/content/renderer/service_worker/embedded_worker_dispatcher.h
+++ b/content/renderer/service_worker/embedded_worker_dispatcher.h
@@ -36,7 +36,8 @@ class EmbeddedWorkerDispatcher : public IPC::Listener {
   void OnStartWorker(int embedded_worker_id,
                      int64 service_worker_version_id,
                      const GURL& service_worker_scope,
-                     const GURL& script_url);
+                     const GURL& script_url,
+                     int worker_devtools_agent_route_id);
   void OnStopWorker(int embedded_worker_id);
 
   IDMap<WorkerWrapper, IDMapOwnPointer> workers_;