fix(packages): use ES modules for primary build (#11120)

modules/@angular/http/testing/index.ts

@@ -0,0 +1,14 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * @module
+ * @description
+ * Entry point for all public APIs of the platform-server/testing package.
+ */
+export * from './mock_backend';

modules/@angular/http/testing/mock_backend.ts

@@ -7,17 +7,11 @@
  */
 
 import {Injectable} from '@angular/core';
+import {Connection, ConnectionBackend, ReadyState, Request, Response} from '@angular/http';
 import {ReplaySubject} from 'rxjs/ReplaySubject';
 import {Subject} from 'rxjs/Subject';
 import {take} from 'rxjs/operator/take';
 
-import {ReadyState} from '../src/enums';
-import {isPresent} from '../src/facade/lang';
-import {Connection, ConnectionBackend} from '../src/interfaces';
-import {Request} from '../src/static_request';
-import {Response} from '../src/static_response';
-
-
 
 /**
  *
@@ -232,7 +226,7 @@ export class MockBackend implements ConnectionBackend {
    * against the framework itself, not by end-users.
    */
   createConnection(req: Request): MockConnection {
-    if (!isPresent(req) || !(req instanceof Request)) {
+    if (!req || !(req instanceof Request)) {
       throw new Error(`createConnection requires an instance of Request, got ${req}`);
     }
     let connection = new MockConnection(req);