feat(http): add support for JSONP requests

Closes #2905
Closes #2818

modules/examples/e2e_test/jsonp/jsonp_spec.ts

@@ -0,0 +1,23 @@
+/// <reference path="../../../angular2/typings/jasmine/jasmine.d.ts" />
+
+import {verifyNoBrowserErrors} from 'angular2/src/test_lib/e2e_util';
+
+describe('jsonp', function() {
+
+  afterEach(verifyNoBrowserErrors);
+
+  describe('fetching', function() {
+    var URL = 'examples/src/jsonp/index.html';
+
+    it('should fetch and display people', function() {
+      browser.get(URL);
+
+      expect(getComponentText('jsonp-app', '.people')).toEqual('hello, caitp');
+    });
+  });
+});
+
+function getComponentText(selector, innerSelector) {
+  return browser.executeScript('return document.querySelector("' + selector + '").querySelector("' +
+                               innerSelector + '").textContent.trim()');
+}