Dart2js support for custom element lifecycle events

pkg/custom_element/lib/custom-elements.debug.js

 // Copyright (c) 2012 The Polymer Authors. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 1446 matching lines @@
   };
 }
 
 if (document.readyState === 'complete') {
   bootstrap();
 } else {
   var loadEvent = window.HTMLImports ? 'HTMLImportsLoaded' : 'DOMContentLoaded';
   window.addEventListener(loadEvent, bootstrap);
 }
 
+// Patch to allow custom element and shadow dom to work together, from:

[blois, 2013/09/19 23:07:11]

Not sure what the best way is to put this in here...

It's required for the custom element polyfill to work with the shadow DOM
polyfill. But is not a part of either.

[Jennifer Messerly, 2013/09/20 17:58:35]

it seems reasonable, but maybe should have feature testing? in other words,
guard the createShadowRoot method with `if (originalCreateShadowRoot) {` ...

btw, this is a generated file right? Is there another commit I should review
that has this patch?

[blois, 2013/09/20 21:39:38]

Done.

+// https://github.com/Polymer/platform/blob/master/src/patches-shadowdom-polyfill.js
+// include .host reference
+var originalCreateShadowRoot = HTMLElement.prototype.createShadowRoot;
+HTMLElement.prototype.createShadowRoot = function() {
+  var root = originalCreateShadowRoot.call(this);
+  root.host = this;
+  return root;
+}
+
 })();