[ServiceWorker] Add EmbeddedWorkerInstanceHost Interface.

content/browser/service_worker/embedded_worker_registry.cc

Index: content/browser/service_worker/embedded_worker_registry.cc
diff --git a/content/browser/service_worker/embedded_worker_registry.cc b/content/browser/service_worker/embedded_worker_registry.cc
index e8c0c86c16d922aca7384566b4e94ed64be672e9..4e3b290bf83896ca3a58b68c4ca77c3b30c4f159 100644
--- a/content/browser/service_worker/embedded_worker_registry.cc
+++ b/content/browser/service_worker/embedded_worker_registry.cc
@@ -79,16 +79,6 @@ void EmbeddedWorkerRegistry::Shutdown() {
   }
 }
 
-void EmbeddedWorkerRegistry::OnWorkerReadyForInspection(
-    int process_id,
-    int embedded_worker_id) {
-  EmbeddedWorkerInstance* worker =
-      GetWorkerForMessage(process_id, embedded_worker_id);
-  if (!worker)
-    return;
-  worker->OnReadyForInspection();
-}
-
 void EmbeddedWorkerRegistry::OnWorkerScriptLoaded(int process_id,
                                                   int embedded_worker_id) {
   EmbeddedWorkerInstance* worker =