Revert "feat(core): extract platforms out of core"

This reverts commit 3f4628c0b0.

modules/angular2/test/compiler/xhr_impl_spec.ts

@@ -0,0 +1,40 @@
+import {
+  AsyncTestCompleter,
+  beforeEach,
+  ddescribe,
+  describe,
+  expect,
+  iit,
+  inject,
+  it,
+  xit
+} from 'angular2/testing_internal';
+
+import {XHRImpl} from 'angular2/src/compiler/xhr_impl';
+import {PromiseWrapper} from 'angular2/src/facade/async';
+
+export function main() {
+  describe('XHRImpl', () => {
+    var xhr: XHRImpl;
+    var url200 = '/base/modules/angular2/test/core/services/static_assets/200.html';
+    var url404 = '/base/modules/angular2/test/core/services/static_assets/404.html';
+
+    beforeEach(() => { xhr = new XHRImpl(); });
+
+    it('should resolve the Promise with the file content on success',
+       inject([AsyncTestCompleter], (async) => {
+         xhr.get(url200).then((text) => {
+           expect(text.trim()).toEqual('<p>hey</p>');
+           async.done();
+         });
+       }), 10000);
+
+    it('should reject the Promise on failure', inject([AsyncTestCompleter], (async) => {
+         PromiseWrapper.catchError(xhr.get(url404), (e) => {
+           expect(e).toEqual(`Failed to load ${url404}`);
+           async.done();
+           return null;
+         });
+       }), 10000);
+  });
+}