Revert "Basic functionality is working with JS native support and polyfill, still some issues with …

tools/dom/templates/html/impl/impl_HTMLDocument.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.
 
 // WARNING: Do not edit - generated code.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 $!MEMBERS
@@ skipping 149 matching lines @@
   Element get pointerLockElement =>
       _webkitPointerLockElement;
 
   @DomName('Document.webkitVisibilityState')
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental()
   String get visibilityState => _webkitVisibilityState;
 
   @Experimental
-  /**
-   * Register a custom subclass of Element to be instantiatable by the DOM.
-   *
-   * This is necessary to allow the construction of any custom elements.
-   *
-   * The class being registered must either subclass HtmlElement or SvgElement.
-   * If they subclass these directly then they can be used as:
-   *
-   *     class FooElement extends HtmlElement{
-   *        void created() {
-   *          print('FooElement created!');
-   *        }
-   *     }
-   *
-   *     main() {
-   *       document.register('x-foo', FooElement);
-   *       var myFoo = new Element.tag('x-foo');
-   *       // prints 'FooElement created!' to the console.
-   *     }
-   *
-   * The custom element can also be instantiated via HTML using the syntax
-   * `<x-foo></x-foo>`
-   *
-   * Other elements can be subclassed as well:
-   *
-   *     class BarElement extends InputElement{
-   *        void created() {
-   *          print('BarElement created!');
-   *        }
-   *     }
-   *
-   *     main() {
-   *       document.register('x-bar', BarElement);
-   *       var myBar = new Element.tag('input', 'x-bar');
-   *       // prints 'BarElement created!' to the console.
-   *     }
-   *
-   * This custom element can also be instantiated via HTML using the syntax
-   * `<input is="x-bar"></input>`
-   *
-   * The [nativeTagName] parameter is needed by platforms without native support
-   * when subclassing a native type other than:
-   *
-   * * HtmlElement
-   * * SvgElement
-   * * AnchorElement
-   * * AudioElement
-   * * ButtonElement
-   * * CanvasElement
-   * * DivElement
-   * * ImageElement
-   * * InputElement
-   * * LIElement
-   * * LabelElement
-   * * MenuElement
-   * * MeterElement
-   * * OListElement
-   * * OptionElement
-   * * OutputElement
-   * * ParagraphElement
-   * * PreElement
-   * * ProgressElement
-   * * SelectElement
-   * * SpanElement
-   * * UListElement
-   * * VideoElement
-   */
 $if DART2JS
-  void register(String tag, Type customElementClass, {String nativeTagName}) {
-    _registerCustomElement(JS('', 'window'), this, tag, customElementClass,
-        nativeTagName);
+  void register(String tag, Type customElementClass) {
+    _registerCustomElement(JS('', 'window'), this, tag, customElementClass);
   }
 $else
-  void register(String tag, Type customElementClass, {String nativeTagName}) {
-    _Utils.register(tag, customElementClass);
+  void register(String tag, Type custom) {
+    _Utils.register(tag, custom);
   }
 $endif
 
 $if DART2JS
   @Creates('Null')  // Set from Dart code; does not instantiate a native type.
 $endif
   // Note: used to polyfill <template>
   Document _templateContentsOwner;
 }