fix(polyfill): import web-animations-js

Author: xidedix

package.json

@@ -55,6 +55,7 @@
     "ts-helpers": "^1.1.2",
     "tsickle": "^0.35.0",
     "tslib": "^1.9.3",
+    "web-animations-js": "^2.3.1",
     "zone.js": "^0.9.1"
   },
   "devDependencies": {

src/polyfills.ts

@@ -49,7 +49,7 @@ import 'mutationobserver-shim';
  * Required to support Web Animations `@angular/platform-browser/animations`.
  * Needed for: All but Chrome, Firefox and Opera. http://caniuse.com/#feat=web-animation
  **/
-// import 'web-animations-js';  // Run `npm install --save web-animations-js`.
+import 'web-animations-js';  // Run `npm install --save web-animations-js`.
 
 /**
  * By default, zone.js will patch all possible macroTask and DomEvents
@@ -59,7 +59,6 @@ import 'mutationobserver-shim';
  (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
  (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
  (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
- (window as any).__Zone_enable_cross_context_check = true;
 
  /*
  * in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js