Introduce worker_devtools_agent_route_id for EmbeddedWorker.

content/renderer/service_worker/embedded_worker_dispatcher.cc

Index: content/renderer/service_worker/embedded_worker_dispatcher.cc
diff --git a/content/renderer/service_worker/embedded_worker_dispatcher.cc b/content/renderer/service_worker/embedded_worker_dispatcher.cc
index 82a3d339cb806ed733d9d21d139733708cf7ed02..11e3f90a8e61021fff8e5a278d1d15ac8549b125 100644
--- a/content/renderer/service_worker/embedded_worker_dispatcher.cc
+++ b/content/renderer/service_worker/embedded_worker_dispatcher.cc
@@ -58,18 +58,19 @@ void EmbeddedWorkerDispatcher::WorkerContextDestroyed(
   workers_.Remove(embedded_worker_id);
 }
 
-void EmbeddedWorkerDispatcher::OnStartWorker(int embedded_worker_id,
+void EmbeddedWorkerDispatcher::OnStartWorker(int worker_route_id,
+                                             int embedded_worker_id,
                                              int64 service_worker_version_id,
                                              const GURL& service_worker_scope,
                                              const GURL& script_url) {
   DCHECK(!workers_.Lookup(embedded_worker_id));
-  scoped_ptr<WorkerWrapper> wrapper(new WorkerWrapper(
-      blink::WebEmbeddedWorker::create(
-          new EmbeddedWorkerContextClient(
-              embedded_worker_id,
-              service_worker_version_id,
-              service_worker_scope,
-              script_url),
+  scoped_ptr<WorkerWrapper> wrapper(
+      new WorkerWrapper(blink::WebEmbeddedWorker::create(
+          new EmbeddedWorkerContextClient(worker_route_id,
+                                          embedded_worker_id,
+                                          service_worker_version_id,
+                                          service_worker_scope,
+                                          script_url),
           NULL)));
 
   blink::WebEmbeddedWorkerStartData start_data;