Ensure the ExtensionSystem is ready before initializing an ExtensionAppModelBuilder

chrome/browser/ui/app_list/app_list_controller_delegate.cc

Index: chrome/browser/ui/app_list/app_list_controller_delegate.cc
diff --git a/chrome/browser/ui/app_list/app_list_controller_delegate.cc b/chrome/browser/ui/app_list/app_list_controller_delegate.cc
index e6bff3e771bcaadb6170e8bead66a9888fc27067..4b508b1b17fe4e251271a66085ef14c317188e4d 100644
--- a/chrome/browser/ui/app_list/app_list_controller_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_controller_delegate.cc
@@ -161,8 +161,7 @@ void AppListControllerDelegate::GetApps(Profile* profile,
                                         ExtensionSet* out_apps) {
   ExtensionService* service =
       extensions::ExtensionSystem::Get(profile)->extension_service();
-  if (!service)
-    return;
+  DCHECK(service);
   out_apps->InsertAll(*service->extensions());
   out_apps->InsertAll(*service->disabled_extensions());
   out_apps->InsertAll(*service->terminated_extensions());