Introduce worker_devtools_agent_route_id for EmbeddedWorker.

content/browser/service_worker/embedded_worker_registry.h

Index: content/browser/service_worker/embedded_worker_registry.h
diff --git a/content/browser/service_worker/embedded_worker_registry.h b/content/browser/service_worker/embedded_worker_registry.h
index 8350f82712156ee6bbb473257041756930bf43d7..1318acd044113e2995f4682b50324d9c85595632 100644
--- a/content/browser/service_worker/embedded_worker_registry.h
+++ b/content/browser/service_worker/embedded_worker_registry.h
@@ -50,7 +50,8 @@ class CONTENT_EXPORT EmbeddedWorkerRegistry
                                       int embedded_worker_id,
                                       int64 service_worker_version_id,
                                       const GURL& scope,
-                                      const GURL& script_url);
+                                      const GURL& script_url,
+                                      int* worker_devtools_agent_route_id);
   ServiceWorkerStatusCode StopWorker(int process_id,
                                      int embedded_worker_id);