refactor: change provide(...) for {provide: ...}

- provide() is deprecated,
- {} syntax is required by the offline compiler

modules/@angular/platform-browser/test/web_workers/shared/message_bus_spec.ts

@@ -112,7 +112,7 @@ export function main() {
     function flushMessages(fn: () => void) { TimerWrapper.setTimeout(fn, 50); }
 
     it("should buffer messages and wait for the zone to exit before sending",
-       withProviders(() => [provide(NgZone, {useClass: MockNgZone})])
+       withProviders(() => [{provide: NgZone, useClass: MockNgZone}])
            .inject([AsyncTestCompleter, NgZone],
                    (async, zone: MockNgZone) => {
                      bus = createConnectedMessageBus();

modules/@angular/platform-browser/test/web_workers/shared/service_message_broker_spec.ts

@@ -27,7 +27,7 @@ export function main() {
   const RESULT = 20;
   const ID = "methodId";
 
-  beforeEachProviders(() => [Serializer, provide(ON_WEB_WORKER, {useValue: true}), RenderStore]);
+  beforeEachProviders(() => [Serializer, {provide: ON_WEB_WORKER, useValue: true}, RenderStore]);
 
   describe("UIMessageBroker", () => {
     var messageBuses;