feat(WebWorker): Expose MessageBroker API

Closes #3942

modules/angular2/test/web_workers/worker/renderer_integration_spec.ts

@@ -43,7 +43,7 @@ import {
   DomProtoView
 } from 'angular2/src/core/render/dom/view/proto_view';
 import {someComponent} from '../../core/render/dom/dom_renderer_integration_spec';
-import {WebWorkerMain} from 'angular2/src/web_workers/ui/impl';
+import {WebWorkerApplication} from 'angular2/src/web_workers/ui/impl';
 import {MessageBasedRenderCompiler} from 'angular2/src/web_workers/ui/render_compiler';
 import {MessageBasedRenderer} from 'angular2/src/web_workers/ui/renderer';
 import {createPairedMessageBuses} from '../shared/web_worker_test_util';
@@ -64,9 +64,11 @@ export function main() {
     // set up the ui side
     var uiMessageBrokerFactory = new ServiceMessageBrokerFactory(uiMessageBus, uiSerializer);
     var renderCompiler = new MessageBasedRenderCompiler(uiMessageBrokerFactory, tb.compiler);
+    renderCompiler.start();
     var renderer = new MessageBasedRenderer(uiMessageBrokerFactory, uiMessageBus, uiSerializer,
                                             uiRenderViewStore, tb.renderer);
-    new WebWorkerMain(renderCompiler, renderer, null, null);
+    renderer.start();
+    new WebWorkerApplication(null, null);
 
     return webWorkerBrokerFactory;
   }

modules/angular2/test/web_workers/worker/xhr_impl_spec.ts

@@ -26,7 +26,7 @@ export function main() {
          const RESPONSE = "Example response text";
 
          var messageBroker: any = new SpyMessageBroker();
-         messageBroker.spy("runOnUiThread")
+         messageBroker.spy("runOnService")
              .andCallFake((args: UiArguments, returnType: Type) => {
                expect(args.method).toEqual("get");
                expect(args.args.length).toEqual(1);