fix compile error

src/vs/workbench/test/electron-browser/api/extHostFileSystemEventService.test.ts

@@ -6,18 +6,25 @@
 
 import * as assert from 'assert';
 import { ExtHostFileSystemEventService } from 'vs/workbench/api/node/extHostFileSystemEventService';
+import { IMainContext } from 'vs/workbench/api/node/extHost.protocol';
 
 suite('ExtHostFileSystemEventService', () => {
 
 
 	test('FileSystemWatcher ignore events properties are reversed #26851', function () {
 
-		const watcher1 = new ExtHostFileSystemEventService().createFileSystemWatcher('**/somethingInteresting', false, false, false);
+		const protocol: IMainContext = {
+			getProxy: () => { return undefined; },
+			set: undefined,
+			assertRegistered: undefined
+		};
+
+		const watcher1 = new ExtHostFileSystemEventService(protocol, undefined).createFileSystemWatcher('**/somethingInteresting', false, false, false);
 		assert.equal(watcher1.ignoreChangeEvents, false);
 		assert.equal(watcher1.ignoreCreateEvents, false);
 		assert.equal(watcher1.ignoreDeleteEvents, false);
 
-		const watcher2 = new ExtHostFileSystemEventService().createFileSystemWatcher('**/somethingBoring', true, true, true);
+		const watcher2 = new ExtHostFileSystemEventService(protocol, undefined).createFileSystemWatcher('**/somethingBoring', true, true, true);
 		assert.equal(watcher2.ignoreChangeEvents, true);
 		assert.equal(watcher2.ignoreCreateEvents, true);
 		assert.equal(watcher2.ignoreDeleteEvents, true);