Adding Element.created constructor

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

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 part of $LIBRARYNAME;
 
 /**
  * Lazy implementation of the child nodes of an element that does not request
  * the actual child nodes of an element until strictly necessary greatly
  * improving performance for the typical cases where it is not required.
@@ skipping 183 matching lines @@
   final Node lastNode;
 
   /** The model used to instantiate the template. */
   final model;
 
   TemplateInstance(this.firstNode, this.lastNode, this.model);
 }
 
 
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+
+  // Custom element created callback.
+  Node._created(): super._created();
+
   List<Node> get nodes {
     return new _ChildNodeListLazy(this);
   }
 
   void set nodes(Iterable<Node> value) {
     // Copy list first since we don't want liveness during iteration.
     // TODO(jacobr): there is a better way to do this.
     List copy = new List.from(value);
     text = '';
     for (Node node in copy) {
@@ skipping 98 matching lines @@
   Map<String, dynamic> get bindings =>
       TemplateElement.mdvPackage(this).bindings;
 
   /** Gets the template instance that instantiated this node, if any. */
   @Experimental()
   TemplateInstance get templateInstance =>
       TemplateElement.mdvPackage(this).templateInstance;
 
 $!MEMBERS
 }