feat(web-workers) Add WebWorker Renderer

Allows angular apps to be rendered from the webworker!
Closes #3052, #3053, and #3097

modules/angular2/src/services/anchor_based_app_root_url.ts

@@ -0,0 +1,21 @@
+import {AppRootUrl} from "angular2/src/services/app_root_url";
+import {DOM} from "angular2/src/dom/dom_adapter";
+import {Injectable} from "angular2/di";
+
+/**
+ * Extension of {@link AppRootUrl} that uses a DOM anchor tag to set the root url to
+ * the current page's url.
+ */
+@Injectable()
+export class AnchorBasedAppRootUrl extends AppRootUrl {
+  constructor() {
+    super("");
+    // compute the root url to pass to AppRootUrl
+    var rootUrl: string;
+    var a = DOM.createElement('a');
+    DOM.resolveAndSetHref(a, './', null);
+    rootUrl = DOM.getHref(a);
+
+    this.value = rootUrl;
+  }
+}

modules/angular2/src/services/app_root_url.ts

@@ -1,6 +1,5 @@
 import {Injectable} from 'angular2/di';
 import {isBlank} from 'angular2/src/facade/lang';
-import {DOM} from 'angular2/src/dom/dom_adapter';
 
 /**
  * Specifies app root url for the application.
@@ -15,16 +14,12 @@ import {DOM} from 'angular2/src/dom/dom_adapter';
 export class AppRootUrl {
   private _value: string;
 
+  constructor(value: string) { this._value = value; }
+
   /**
    * Returns the base URL of the currently running application.
    */
-  get value() {
-    if (isBlank(this._value)) {
-      var a = DOM.createElement('a');
-      DOM.resolveAndSetHref(a, './', null);
-      this._value = DOM.getHref(a);
-    }
+  get value() { return this._value; }
 
-    return this._value;
-  }
+  set value(value: string) { this._value = value; }
 }