Small fixes for Servicified SW code path

content/child/service_worker/service_worker_network_provider.cc

Index: content/child/service_worker/service_worker_network_provider.cc
diff --git a/content/child/service_worker/service_worker_network_provider.cc b/content/child/service_worker/service_worker_network_provider.cc
index 82556e62939e90541ec655af0ec79f4950512e16..5521e4423465f67ca5160da204af02efa86d94af 100644
--- a/content/child/service_worker/service_worker_network_provider.cc
+++ b/content/child/service_worker/service_worker_network_provider.cc
@@ -163,6 +163,10 @@ ServiceWorkerNetworkProvider::CreateForNavigation(
 ServiceWorkerNetworkProvider*
 ServiceWorkerNetworkProvider::FromWebServiceWorkerNetworkProvider(
     blink::WebServiceWorkerNetworkProvider* provider) {
+  if (!provider) {
+    DCHECK(ServiceWorkerUtils::IsServicificationEnabled());
+    return nullptr;
+  }
   return static_cast<WebServiceWorkerNetworkProviderForFrame*>(provider)
       ->provider();
 }