Optimize dartium dart:html bindings so real world application performance is acceptable. Improves d…

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 182 matching lines @@
   List<Node> get rawList => _this.childNodes;
 }
 
 
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 
   // Custom element created callback.
 $if DART2JS
   Node._created() : super._created();
 $else
-  Node._created() : super._created() {
-    // By this point blink_jsObject should be setup if it's not then we weren't
-    // called by the registerElement createdCallback - probably created() was
-    // called directly which is verboten.
-    if (this.blink_jsObject == null) {
-      throw new DomException.jsInterop("the created constructor cannot be called directly");
-    }
-  }
+  Node._created() : super._created();
 $endif
 
   /**
    * A modifiable list of this node's children.
    */
   List<Node> get nodes {
     return new _ChildNodeListLazy(this);
   }
 
   set nodes(Iterable<Node> value) {
@@ skipping 76 matching lines @@
   /**
    * A list of this node's children.
    *
    * ## Other resources
    *
    * * [Node.childNodes](https://developer.mozilla.org/en-US/docs/Web/API/Node.childNodes)
    *   from MDN.
    */
   @DomName('Node.childNodes')
   @DocsEditable()
-  List<Node> get childNodes => wrap_jso(_blink.BlinkNode.instance.childNodes_Getter_(unwrap_jso(this)));
+  List<Node> get childNodes => _blink.BlinkNode.instance.childNodes_Getter_(this);
 $else
   /**
    * A list of this node's children.
    *
    * ## Other resources
    *
    * * [Node.childNodes](https://developer.mozilla.org/en-US/docs/Web/API/Node.childNodes)
    *   from MDN.
    */
   @DomName('Node.childNodes')
   @DocsEditable()
   @Returns('NodeList')
   @Creates('NodeList')
   final List<Node> childNodes;
 
 $endif
 $!MEMBERS
 }