fix(web_workers): remove unnecessary setup module and AppRootUrl

Since AppRootUrl is removed, the logic for extending and emitting
the root url as part of the setup seems unnecessary.

BREAKING CHANGES:

The setupWebWorker function exported from 
angular2/platform/worker_app  no longer returns a promise of providers, 
but instead synchronously returns providers.

Related to #5815
Closes #5820

modules/angular2/src/compiler/anchor_based_app_root_url.ts

@@ -1,16 +0,0 @@
-import {DOM} from "angular2/src/platform/dom/dom_adapter";
-import {Injectable} from "angular2/src/core/di";
-
-/**
- * Set the root url to the current page's url.
- */
-@Injectable()
-export class AnchorBasedAppRootUrl {
-  value: string;
-  constructor() {
-    // compute the root url
-    var a = DOM.createElement('a');
-    DOM.resolveAndSetHref(a, './', null);
-    this.value = DOM.getHref(a);
-  }
-}

modules/angular2/src/compiler/compiler.ts

@@ -25,7 +25,6 @@ import {RuntimeCompiler} from 'angular2/src/compiler/runtime_compiler';
 import {ElementSchemaRegistry} from 'angular2/src/compiler/schema/element_schema_registry';
 import {DomElementSchemaRegistry} from 'angular2/src/compiler/schema/dom_element_schema_registry';
 import {UrlResolver, DEFAULT_PACKAGE_URL_PROVIDER} from 'angular2/src/compiler/url_resolver';
-import {AnchorBasedAppRootUrl} from 'angular2/src/compiler/anchor_based_app_root_url';
 import {Parser, Lexer} from 'angular2/src/core/change_detection/change_detection';
 
 function _createChangeDetectorGenConfig() {
@@ -49,6 +48,5 @@ export const COMPILER_PROVIDERS: Array<Type | Provider | any[]> = CONST_EXPR([
   new Provider(Compiler, {useExisting: RuntimeCompiler}),
   DomElementSchemaRegistry,
   new Provider(ElementSchemaRegistry, {useExisting: DomElementSchemaRegistry}),
-  AnchorBasedAppRootUrl,
   UrlResolver
 ]);

modules/angular2/src/platform/worker_app_common.ts

@@ -31,9 +31,7 @@ import {
 } from 'angular2/src/web_workers/shared/render_view_with_fragments_store';
 import {WebWorkerEventDispatcher} from 'angular2/src/web_workers/worker/event_dispatcher';
 import {NgZone} from 'angular2/src/core/zone/ng_zone';
-import {Promise, PromiseWrapper, PromiseCompleter} from 'angular2/src/facade/async';
-import {SETUP_CHANNEL} from 'angular2/src/web_workers/shared/messaging_api';
-import {ObservableWrapper} from 'angular2/src/facade/async';
+import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
 
 class PrintLogger {
   log = print;
@@ -76,20 +74,9 @@ function _exceptionHandler(): ExceptionHandler {
  */
 export function genericWorkerAppProviders(bus: MessageBus,
                                           zone: NgZone): Promise<Array<Type | Provider | any[]>> {
-  var bootstrapProcess: PromiseCompleter<any> = PromiseWrapper.completer();
   bus.attachToZone(zone);
-  bus.initChannel(SETUP_CHANNEL, false);
-
-  var subscription: any;
-  var emitter = bus.from(SETUP_CHANNEL);
-  subscription = ObservableWrapper.subscribe(emitter, (initData: {[key: string]: any}) => {
-    var bindings = ListWrapper.concat(WORKER_APP_COMMON_PROVIDERS, [
-      new Provider(MessageBus, {useValue: bus}),
-    ]);
-    bootstrapProcess.resolve(bindings);
-    ObservableWrapper.dispose(subscription);
-  });
-
-  ObservableWrapper.callNext(bus.to(SETUP_CHANNEL), "ready");
-  return bootstrapProcess.promise;
+  var bindings = ListWrapper.concat(WORKER_APP_COMMON_PROVIDERS, [
+    new Provider(MessageBus, {useValue: bus}),
+  ]);
+  return PromiseWrapper.resolve(bindings);
 }

modules/angular2/src/platform/worker_render.ts

@@ -6,7 +6,6 @@ import {
 import {MessageBus} from 'angular2/src/web_workers/shared/message_bus';
 import {APP_INITIALIZER} from 'angular2/core';
 import {Injector, Injectable, Provider} from 'angular2/src/core/di';
-import {WebWorkerSetup} from 'angular2/src/web_workers/ui/setup';
 import {MessageBasedRenderer} from 'angular2/src/web_workers/ui/renderer';
 import {MessageBasedXHRImpl} from 'angular2/src/web_workers/ui/xhr_impl';
 import {

modules/angular2/src/platform/worker_render_common.ts

@@ -1,7 +1,6 @@
 import {CONST_EXPR, IS_DART} from 'angular2/src/facade/lang';
 import {MessageBus} from 'angular2/src/web_workers/shared/message_bus';
 import {NgZone} from 'angular2/src/core/zone/ng_zone';
-import {AnchorBasedAppRootUrl} from 'angular2/src/compiler/anchor_based_app_root_url';
 import {
   PLATFORM_DIRECTIVES,
   PLATFORM_PIPES,
@@ -35,7 +34,6 @@ import {Testability} from 'angular2/src/core/testability/testability';
 import {BrowserGetTestability} from 'angular2/src/platform/browser/testability';
 import {BrowserDomAdapter} from './browser/browser_adapter';
 import {wtfInit} from 'angular2/src/core/profile/wtf_init';
-import {WebWorkerSetup} from 'angular2/src/web_workers/ui/setup';
 import {MessageBasedRenderer} from 'angular2/src/web_workers/ui/renderer';
 import {MessageBasedXHRImpl} from 'angular2/src/web_workers/ui/xhr_impl';
 import {
@@ -57,7 +55,7 @@ export const WORKER_SCRIPT: OpaqueToken = CONST_EXPR(new OpaqueToken("WebWorkerS
 
 // Message based Worker classes that listen on the MessageBus
 export const WORKER_RENDER_MESSAGING_PROVIDERS: Array<any /*Type | Provider | any[]*/> =
-    CONST_EXPR([MessageBasedRenderer, MessageBasedXHRImpl, WebWorkerSetup]);
+    CONST_EXPR([MessageBasedRenderer, MessageBasedXHRImpl]);
 
 export const WORKER_RENDER_PLATFORM: Array<any /*Type | Provider | any[]*/> = CONST_EXPR([
   PLATFORM_COMMON_PROVIDERS,
@@ -81,7 +79,6 @@ export const WORKER_RENDER_APP_COMMON: Array<any /*Type | Provider | any[]*/> =
   MessageBasedXHRImpl,
   new Provider(ServiceMessageBrokerFactory, {useClass: ServiceMessageBrokerFactory_}),
   new Provider(ClientMessageBrokerFactory, {useClass: ClientMessageBrokerFactory_}),
-  AnchorBasedAppRootUrl,
   Serializer,
   new Provider(ON_WEB_WORKER, {useValue: false}),
   RenderViewWithFragmentsStore,

modules/angular2/src/web_workers/shared/messaging_api.ts

@@ -2,7 +2,6 @@
  * All channels used by angular's WebWorker components are listed here.
  * You should not use these channels in your application code.
  */
-export const SETUP_CHANNEL = "ng-WebWorkerSetup";
 export const RENDERER_CHANNEL = "ng-Renderer";
 export const XHR_CHANNEL = "ng-XHR";
 export const EVENT_CHANNEL = "ng-events";

modules/angular2/src/web_workers/ui/setup.ts

@@ -1,27 +0,0 @@
-import {SETUP_CHANNEL} from 'angular2/src/web_workers/shared/messaging_api';
-import {EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';
-import {MessageBus} from 'angular2/src/web_workers/shared/message_bus';
-import {AnchorBasedAppRootUrl} from 'angular2/src/compiler/anchor_based_app_root_url';
-import {StringWrapper} from 'angular2/src/facade/lang';
-import {Injectable} from 'angular2/src/core/di';
-
-@Injectable()
-export class WebWorkerSetup {
-  rootUrl: string;
-
-  constructor(private _bus: MessageBus, anchorBasedAppRootUrl: AnchorBasedAppRootUrl) {
-    this.rootUrl = anchorBasedAppRootUrl.value;
-  }
-
-  start(): void {
-    this._bus.initChannel(SETUP_CHANNEL, false);
-    var sink = this._bus.to(SETUP_CHANNEL);
-    var source = this._bus.from(SETUP_CHANNEL);
-
-    ObservableWrapper.subscribe(source, (message: string) => {
-      if (StringWrapper.equals(message, "ready")) {
-        ObservableWrapper.callEmit(sink, {"rootUrl": this.rootUrl});
-      }
-    });
-  }
-}

modules/angular2/test/public_api_spec.ts

@@ -614,9 +614,6 @@ var NG_COMPILER = [
   "VariableAst.sourceSpan=",
   "VariableAst.value",
   "VariableAst.value=",
-  "AppRootUrl",
-  "AppRootUrl.value",
-  "AppRootUrl.value=",
   "DEFAULT_PACKAGE_URL_PROVIDER",
   "UrlResolver",
   "UrlResolver.resolve()",