Re-enabled code to aggressively upgrade on wrap_jso

tools/dom/templates/html/dartium/html_dartium.darttemplate

Index: tools/dom/templates/html/dartium/html_dartium.darttemplate
diff --git a/tools/dom/templates/html/dartium/html_dartium.darttemplate b/tools/dom/templates/html/dartium/html_dartium.darttemplate
index 5885320896551b07e3c08c3ba6a6c0132330c8fe..22158c9357e793f980d374dd881b5ef94a779159 100644
--- a/tools/dom/templates/html/dartium/html_dartium.darttemplate
+++ b/tools/dom/templates/html/dartium/html_dartium.darttemplate
@@ -451,6 +451,22 @@ wrap_jso(jsObject) {
     var wrapper = js.getDartHtmlWrapperFor(jsObject);
     // if we have a wrapper return the Dart instance.
     if (wrapper != null) {
+      if (wrapper.runtimeType == HtmlElement && !wrapper._isBadUpgrade) {
+        // We're a Dart instance but we need to upgrade.
+        var customElementClass = _getCustomElementType(wrapper);
+        if (customElementClass != null) {
+          var dartClass_instance;
+          try {
+            dartClass_instance = _blink.Blink_Utils.constructElement(customElementClass, jsObject);
+          } finally {
+            dartClass_instance.blink_jsObject = jsObject;
+            jsObject['dart_class'] = dartClass_instance;
+            js.setDartHtmlWrapperFor(jsObject, dartClass_instance);
+            return dartClass_instance;
+          }
+        }
+      }
+
       return wrapper;
     }