Fix for Animation and other polyfills

pkg/dev_compiler/lib/js/legacy/dart_library.js

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /* This file defines the module loader for the dart runtime.
 */
 var dart_library;
 if (!dart_library) {
 dart_library =
   typeof module != "undefined" && module.exports || {};
@@ skipping 122 matching lines @@
   dart_library.start = start;
 
   let _bootstrapped = false;
   function bootstrap() {
     if (_bootstrapped) return;
     _bootstrapped = true;
 
     // Force import of core.
     var dart_sdk = import_('dart_sdk');
 
-    // TODO(vsm): Move this to a shared location:
-    // https://github.com/dart-lang/sdk/issues/27605
-    if (typeof NodeList !== "undefined") {
-      // TODO(vsm): Do we still need these?
-      NodeList.prototype.get = function(i) { return this[i]; };
-      NamedNodeMap.prototype.get = function(i) { return this[i]; };
-      DOMTokenList.prototype.get = function(i) { return this[i]; };
-      HTMLCollection.prototype.get = function(i) { return this[i]; };
-
-      // Expose constructors for DOM types dart:html needs to assume are
-      // available on window.
-      if (typeof PannerNode == "undefined") {
-        let audioContext;
-        if (typeof AudioContext == "undefined" &&
-            (typeof webkitAudioContext != "undefined")) {
-          audioContext = new webkitAudioContext();
-        } else {
-          audioContext = new AudioContext();
-          window.StereoPannerNode =
-              audioContext.createStereoPanner().constructor;
-        }
-        window.PannerNode = audioContext.createPanner().constructor;
-      }
-      if (typeof AudioSourceNode == "undefined") {
-        window.AudioSourceNode = MediaElementAudioSourceNode.constructor;
-      }
-      if (typeof FontFaceSet == "undefined") {
-        window.FontFaceSet = document.fonts.__proto__.constructor;
-      }
-      if (typeof MemoryInfo == "undefined") {
-        if (typeof window.performance.memory != "undefined") {
-          window.MemoryInfo = window.performance.memory.constructor;
-        }
-      }
-      if (typeof Geolocation == "undefined") {
-        navigator.geolocation.constructor;
-      }
-      if (typeof Animation == "undefined") {
-        let d = document.createElement('div');
-        if (typeof d.animate != "undefined") {
-          window.Animation = d.animate(d).constructor;
-        }
-      }
-      if (typeof SourceBufferList == "undefined") {
-        window.SourceBufferList = new MediaSource().sourceBuffers.constructor;
-      }
-    }
-
     // This import is only needed for chrome debugging. We should provide an
     // option to compile without it.
     dart_sdk._debugger.registerDevtoolsFormatter();
   }
 
 })(dart_library);
 }