Dart2js support for custom element lifecycle events

pkg/shadow_dom/lib/shadow_dom.debug.js

Index: pkg/shadow_dom/lib/shadow_dom.debug.js
diff --git a/pkg/shadow_dom/lib/shadow_dom.debug.js b/pkg/shadow_dom/lib/shadow_dom.debug.js
index b889a5ef7641e88b18def663b474fd422bcafc32..c96a6a469feb71542ebd34a59ad0dbfc810a3dd0 100644
--- a/pkg/shadow_dom/lib/shadow_dom.debug.js
+++ b/pkg/shadow_dom/lib/shadow_dom.debug.js
@@ -1,5 +1,4 @@
-if ((!HTMLElement.prototype.createShadowRoot &&
-    !HTMLElement.prototype.webkitCreateShadowRoot) ||
+if ((!HTMLElement.prototype.createShadowRoot) ||
     window.__forceShadowDomPolyfill) {
 
 /*
@@ -5135,8 +5134,10 @@ var ShadowDOMPolyfill = {};
       // TODO(jmesserly): do we still need these?
       if (obj instanceof NodeList) return 'NodeList';
       if (obj instanceof ShadowRoot) return 'ShadowRoot';
-      if (obj instanceof MutationRecord) return 'MutationRecord';
-      if (obj instanceof MutationObserver) return 'MutationObserver';
+      if (window.MutationRecord && (obj instanceof MutationRecord))

[blois, 2013/09/20 23:27:36]

Note that I can't get the build tool to run (can't find
"third_party/polymer/ShadowDOM/build.json"), so the minified version is not
updated.

+          return 'MutationRecord';
+      if (window.MutationObserver && (obj instanceof MutationObserver))
+          return 'MutationObserver';
 
       var unwrapped = unwrapIfNeeded(obj);
       if (obj !== unwrapped) {
@@ -5688,4 +5689,4 @@ scope.ShadowCSS = ShadowCSS;
   scope.ShadowCSS.shimShadowDOMStyling2 = shimShadowDOMStyling2;
 })(window.Platform);
 
-}
+}