fix: remove internal usages of deprecated overrideOnTurnDone

Closes #5079

modules/angular2/src/core/application_ref.ts

@@ -6,7 +6,12 @@ import {
   APP_COMPONENT,
   APP_ID_RANDOM_PROVIDER
 } from './application_tokens';
-import {Promise, PromiseWrapper, PromiseCompleter} from 'angular2/src/core/facade/async';
+import {
+  Promise,
+  PromiseWrapper,
+  PromiseCompleter,
+  ObservableWrapper
+} from 'angular2/src/core/facade/async';
 import {ListWrapper} from 'angular2/src/core/facade/collection';
 import {Reflector, reflector} from 'angular2/src/core/reflection/reflection';
 import {TestabilityRegistry, Testability} from 'angular2/src/core/testability/testability';
@@ -369,7 +374,8 @@ export class ApplicationRef_ extends ApplicationRef {
   constructor(private _platform: PlatformRef_, private _zone: NgZone, private _injector: Injector) {
     super();
     if (isPresent(this._zone)) {
-      this._zone.overrideOnTurnDone(() => this.tick());
+      ObservableWrapper.subscribe(this._zone.onTurnDone,
+                                  (_) => { this._zone.run(() => { this.tick(); }); });
     }
     this._enforceNoNewChanges = assertionsEnabled();
   }

modules/angular2/src/upgrade/upgrade_adapter.ts

@@ -16,6 +16,7 @@ import {
 import {applicationDomProviders} from 'angular2/src/core/application_common';
 import {applicationCommonProviders} from 'angular2/src/core/application_ref';
 import {compilerProviders} from 'angular2/src/core/compiler/compiler';
+import {ObservableWrapper} from 'angular2/src/core/facade/async';
 
 import {getComponentInfo, ComponentInfo} from './metadata';
 import {onError, controllerKey} from './util';
@@ -342,7 +343,8 @@ export class UpgradeAdapter {
           '$rootScope',
           (injector: angular.IInjectorService, rootScope: angular.IRootScopeService) => {
             ng1Injector = injector;
-            ngZone.overrideOnTurnDone(() => rootScope.$apply());
+            ObservableWrapper.subscribe(ngZone.onTurnDone,
+                                        (_) => { ngZone.run(() => rootScope.$apply()); });
             ng1compilePromise =
                 UpgradeNg1ComponentAdapterBuilder.resolve(this.downgradedComponents, injector);
           }