feat(web-workers) Add WebWorker Renderer

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

modules/benchmarks/src/compiler/compiler_benchmark.ts

@@ -41,7 +41,7 @@ export function main() {
                                                  new ViewLoader(null, null, null));
   var compiler = new Compiler(reader, cache, viewResolver, new ComponentUrlMapper(), urlResolver,
                               renderCompiler, new ProtoViewFactory(new DynamicChangeDetection()),
-                              new FakeAppRootUrl());
+                              new AppRootUrl(""));
 
   function measureWrapper(func, desc) {
     return function() {
@@ -161,7 +161,3 @@ class BenchmarkComponentNoBindings {
 })
 class BenchmarkComponentWithBindings {
 }
-
-class FakeAppRootUrl extends AppRootUrl {
-  get value() { return ''; }
-}