feat: allow Type.annotations = Component(...).View(...)

Closes #2577

modules/angular2/test/core/annotations/decorators_spec.ts

@@ -11,6 +11,7 @@ import {
 } from 'angular2/test_lib';
 
 import {Component, View, Directive} from 'angular2/angular2';
+import {reflector} from 'angular2/src/reflection/reflection';
 
 export function main() {
   describe('es5 decorators', () => {
@@ -24,5 +25,12 @@ export function main() {
           Component({}).View({}).View({}).Class({constructor: function() { this.works = true; }});
       expect(new MyComponent().works).toEqual(true);
     });
+
+    it('should create type in ES5', () => {
+      function MyComponent(){};
+      var as;
+      (<any>MyComponent).annotations = as = Component({}).View({});
+      expect(reflector.annotations(MyComponent)).toEqual(as.annotations);
+    });
   });
 }