Create ServiceWorkerProviderHost before starting worker

content/common/service_worker/service_worker.mojom

Index: content/common/service_worker/service_worker.mojom
diff --git a/content/common/service_worker/service_worker.mojom b/content/common/service_worker/service_worker.mojom
index 185e01856bf70cea7176437891115a86cd5d2a0f..75210c5c5a86b2126f905d4b0219ee5db38a7dd5 100644
--- a/content/common/service_worker/service_worker.mojom
+++ b/content/common/service_worker/service_worker.mojom
@@ -19,12 +19,4 @@ interface ServiceWorkerDispatcherHost {
   // ServiceWorkerProviderHost will be tied to the
   // mojom::ServiceWorkerProviderHost interface.
   OnProviderCreated(ServiceWorkerProviderHostInfo provider_info);
-
-  // Informs the browser that a service worker is starting up. |provider_id|
-  // identifies the ServiceWorkerProviderHost hosting the service
-  // worker. |version_id| identifies the ServiceWorkerVersion and
-  // |embedded_worker_id| identifies the EmbeddedWorkerInstance.  
-  OnSetHostedVersionId(int32 provider_id,
-                       int64 version_id,
-                       int32 embedded_worker_id);
 };