add `extensionHostWorker` entry point, fixes...

add `extensionHostWorker` entry point, fixes https://github.com/microsoft/vscode-internalbacklog/issues/738

build/gulpfile.vscode.web.js

@@ -53,6 +53,7 @@ const buildfile = require('../src/buildfile');
 const vscodeWebEntryPoints = [
 	buildfile.workbenchWeb,
 	buildfile.serviceWorker,
+	buildfile.workerExtensionHost,
 	buildfile.keyboardMaps,
 	buildfile.base
 ];
@@ -148,4 +149,4 @@ const dashed = (str) => (str ? `-${str}` : ``);
 		vscodeWebTaskCI
 	));
 	gulp.task(vscodeWebTask);
-});
\ No newline at end of file
+});

src/buildfile.js

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-function entrypoint (name) {
+function entrypoint(name) {
 	return [{ name: name, include: [], exclude: ['vs/css', 'vs/nls'] }];
 }
 
@@ -23,6 +23,14 @@ exports.serviceWorker = [{
 	dest: 'vs/workbench/contrib/resources/browser/resourceServiceWorkerMain.js'
 }];
 
+exports.workerExtensionHost = [{
+	name: 'vs/workbench/services/extensions/worker/extensionHostWorker',
+	// include: [],
+	prepend: ['vs/loader.js'],
+	append: ['vs/workbench/services/extensions/worker/extensionHostWorkerMain'],
+	dest: 'vs/workbench/services/extensions/worker/extensionHostWorkerMain.js'
+}];
+
 exports.workbench = require('./vs/workbench/buildfile').collectModules(['vs/workbench/workbench.desktop.main']);
 exports.workbenchWeb = entrypoint('vs/workbench/workbench.web.api');