commit 1f3e13407f9b74ef739447a481767c7265e64916
author Terry Lucas <terry@google.com> Thu Oct 29 17:05:59 2015 -0700
committer Kevin Moore <kevmoo@google.com> Fri Oct 30 12:44:42 2015 -0700
tree 46b4df5e3e07e2c4b746477836b009cb2b5dcd7f
parent 99c83b0b4e9842029dc45fe6e852e30171e605d8

Fixed Native custom element

BUG=24754
R=alanknight@google.com

Review URL: https://codereview.chromium.org/1422323006 .

(cherry picked from commit e84f9941e1cf210646aef72e01eefaa993a7b798)

sdk/lib/html/html_common/conversions_dartium.dart

diff --git a/sdk/lib/html/html_common/conversions_dartium.dart b/sdk/lib/html/html_common/conversions_dartium.dart
index 0f2c075..56ed9d5 100644
--- a/sdk/lib/html/html_common/conversions_dartium.dart
+++ b/sdk/lib/html/html_common/conversions_dartium.dart
@@ -176,11 +176,19 @@
     } else {
       func = getHtmlCreateFunction(jsTypeName);
       if (func == null) {
-        if (jsTypeName == 'auto-binding') {
-          func = getHtmlCreateFunction('HTMLTemplateElement');
-        } else if (jsObject.toString() == "[object HTMLElement]") {
-          // One last ditch effort could be a JS custom element.
-          func = getHtmlCreateFunction('HTMLElement');
+        // Start walking the prototype chain looking for a JS class.
+        var prototype = jsObject['__proto__'];
+        var keepWalking = true;
+        while (keepWalking && prototype.hasProperty('__proto__')) {
+          prototype = prototype['__proto__'];
+          if (prototype != null && prototype is Element &&
+              prototype.blink_jsObject != null) {
+            // We're a Dart class that's pointing to a JS class.
+            var blinkJso = prototype.blink_jsObject;
+            jsTypeName = blinkJso['constructor']['name'];
+            func = getHtmlCreateFunction(jsTypeName);
+            keepWalking = func == null;
+          }
         }
       }
     }