refactor(render): create and store render ProtoViewRef in every app ProtoView

Needed to change Renderer.mergeChildComponentProtoViews to not create
new ProtoViews to be able to deal with cyclic references.

This commit is part of using the new render layer in Angular.

modules/angular2/src/core/application.js

@@ -3,7 +3,6 @@ import {Type, isBlank, isPresent, BaseException, assertionsEnabled, print, strin
 import {BrowserDomAdapter} from 'angular2/src/dom/browser_adapter';
 import {DOM} from 'angular2/src/dom/dom_adapter';
 import {Compiler, CompilerCache} from './compiler/compiler';
-import {ProtoView} from './compiler/view';
 import {Reflector, reflector} from 'angular2/src/reflection/reflection';
 import {Parser, Lexer, ChangeDetection, dynamicChangeDetection, jitChangeDetection} from 'angular2/change_detection';
 import {ExceptionHandler} from './exception_handler';
@@ -72,12 +71,11 @@ function _injectorBindings(appComponentType): List<Binding> {
           throw new BaseException(`Only Components can be bootstrapped; ` +
                                   `Directive of ${stringify(type)} is not a Component`);
         }
-        return compiler.compile(appComponentAnnotatedType.type).then(
-            (protoView) => {
-          var appProtoView = ProtoView.createRootProtoView(protoView, appElement,
-            DirectiveBinding.createFromType(appComponentAnnotatedType.type, appComponentAnnotatedType.annotation),
-            changeDetection.createProtoChangeDetector('root'),
-            strategy);
+        return compiler.compileRoot(
+            appElement,
+            DirectiveBinding.createFromType(appComponentAnnotatedType.type, appComponentAnnotatedType.annotation)
+          ).then(
+            (appProtoView) => {
           // The light Dom of the app element is not considered part of
           // the angular application. Thus the context and lightDomInjector are
           // empty.