Dartium JS Enabled take 2

tools/dom/templates/html/impl/impl_ServiceWorker.darttemplate

Index: tools/dom/templates/html/impl/impl_ServiceWorker.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Text.darttemplate b/tools/dom/templates/html/impl/impl_ServiceWorker.darttemplate
similarity index 66%
copy from tools/dom/templates/html/impl/impl_Text.darttemplate
copy to tools/dom/templates/html/impl/impl_ServiceWorker.darttemplate
index 8c530587802ab44536d2bac2c7d7e3eaa6b857d6..6cb64ab3ad1ad928fd763f04f48b6a51ba93373b 100644
--- a/tools/dom/templates/html/impl/impl_Text.darttemplate
+++ b/tools/dom/templates/html/impl/impl_ServiceWorker.darttemplate
@@ -2,11 +2,14 @@
 // 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.
 
-// WARNING: Do not edit - generated code.
-
 part of $LIBRARYNAME;
 
+@DocsEditable()
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
-  factory $CLASSNAME(String data) => document._createTextNode(data);
 $!MEMBERS
+$if DARTIUM
+  // Override these methods for Dartium _ServiceWorker can't be abstract.
+  Stream<ErrorEvent> get onError => errorEvent.forTarget(this);
+$endif
 }
+