Introduce worker_devtools_agent_route_id for EmbeddedWorker.

content/browser/service_worker/embedded_worker_instance.cc

Index: content/browser/service_worker/embedded_worker_instance.cc
diff --git a/content/browser/service_worker/embedded_worker_instance.cc b/content/browser/service_worker/embedded_worker_instance.cc
index 6ee4356e6797705b5d6cb933b6bcf95570ebec79..8a96e1f2898ec348ca96d874b1549f9273be9a2d 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -28,10 +28,12 @@ ServiceWorkerStatusCode EmbeddedWorkerInstance::Start(
                              embedded_worker_id_,
                              service_worker_version_id,
                              scope,
-                             script_url);
+                             script_url,
+                             &worker_route_id_);
   if (status != SERVICE_WORKER_OK) {
     status_ = STOPPED;
     process_id_ = -1;
+    worker_route_id_ = MSG_ROUTING_NONE;
   }
   return status;
 }
@@ -70,14 +72,14 @@ void EmbeddedWorkerInstance::ReleaseProcessReference(int process_id) {
     process_refs_.erase(found);
 }
 
-EmbeddedWorkerInstance::EmbeddedWorkerInstance(
-    EmbeddedWorkerRegistry* registry,
-    int embedded_worker_id)
+EmbeddedWorkerInstance::EmbeddedWorkerInstance(EmbeddedWorkerRegistry* registry,
+                                               int embedded_worker_id)
     : registry_(registry),
       embedded_worker_id_(embedded_worker_id),
       status_(STOPPED),
       process_id_(-1),
-      thread_id_(-1) {
+      thread_id_(-1),
+      worker_route_id_(MSG_ROUTING_NONE) {
 }
 
 void EmbeddedWorkerInstance::OnStarted(int thread_id) {
@@ -94,6 +96,7 @@ void EmbeddedWorkerInstance::OnStopped() {
   status_ = STOPPED;
   process_id_ = -1;
   thread_id_ = -1;
+  worker_route_id_ = MSG_ROUTING_NONE;
   FOR_EACH_OBSERVER(Listener, listener_list_, OnStopped());
 }