docs(aio): Upgrade examples to Angular 6 (#23234)

PR Close #23234

aio/content/examples/set-document-title/e2e/src/app.e2e-spec.ts

@@ -0,0 +1,30 @@
+'use strict'; // necessary for es6 output in node
+
+import { browser, element, by, ElementFinder } from 'protractor';
+
+describe('Set Document Title', function () {
+
+    beforeAll(function () {
+        browser.get('');
+    });
+
+    it('should set the document title', function () {
+
+      let titles = [
+        'Good morning!',
+        'Good afternoon!',
+        'Good evening!'
+      ];
+
+      element.all( by.css( 'ul li a' ) ).each(
+        function iterator( element: ElementFinder, i: number ) {
+
+          element.click();
+          expect( browser.getTitle() ).toEqual( titles[ i ] );
+
+        }
+      );
+
+  });
+
+});