bundle the worker.

build/gulpfile.vscode.js

@@ -43,6 +43,7 @@ const vscodeEntryPoints = _.flatten([
 	buildfile.entrypoint('vs/workbench/workbench.desktop.main'),
 	buildfile.base,
 	buildfile.workerExtensionHost,
+	buildfile.workerNotebook,
 	buildfile.workbenchDesktop,
 	buildfile.code
 ]);

src/buildfile.js

@@ -16,6 +16,7 @@ exports.base = [{
 }];
 
 exports.workerExtensionHost = [entrypoint('vs/workbench/services/extensions/worker/extensionHostWorker')];
+exports.workerNotebook = [entrypoint('vs/workbench/contrib/notebook/common/services/notebookSimpleWorker')];
 
 exports.workbenchDesktop = require('./vs/workbench/buildfile.desktop').collectModules();
 exports.workbenchWeb = require('./vs/workbench/buildfile.web').collectModules();