appendHtml and insertAdjacentHtml should be consistently sanitized

tools/dom/templates/html/impl/impl_Element.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;
 
 class _ChildrenElementList extends ListBase<Element>
     implements NodeListWrapper {
   // Raw Element.
   final Element _element;
@@ skipping 709 matching lines @@
    * Adds the specified text after the last child of this element.
    */
   void appendText(String text) {
     this.append(new Text(text));
   }
 
   /**
    * Parses the specified text as HTML and adds the resulting node after the
    * last child of this element.
    */
-  void appendHtml(String text) {
-    this.insertAdjacentHtml('beforeend', text);
+  void appendHtml(String text, {NodeValidator validator,
+      NodeTreeSanitizer treeSanitizer}) {
+    this.insertAdjacentHtml('beforeend', text, validator: validator,
+        treeSanitizer: treeSanitizer);
   }
 
   /**
    * Checks to see if the tag name is supported by the current platform.
    *
    * The tag should be a valid HTML tag name.
    */
   static bool isTagSupported(String tag) {
     var e = _ElementFactoryProvider.createElement_tag(tag, null);
     return e is Element && !(e is UnknownElement);
@@ skipping 258 matching lines @@
    *     // Inserts as the first child
    *     document.body.insertAdjacentHtml('afterBegin', html);
    *     var createdElement = document.body.children[0];
    *     print(createdElement.classes[0]); // Prints 'something'
    *
    * See also:
    *
    * * [insertAdjacentText]
    * * [insertAdjacentElement]
    */
-  void insertAdjacentHtml(String where, String html) {
-    if (JS('bool', '!!#.insertAdjacentHTML', this)) {
-      _insertAdjacentHtml(where, html);
-    } else {
-      _insertAdjacentNode(where, new DocumentFragment.html(html));
-    }
+  void insertAdjacentHtml(String where, String html, {NodeValidator validator,
+      NodeTreeSanitizer treeSanitizer}) {
+      _insertAdjacentNode(where, new DocumentFragment.html(html,
+          validator: validator, treeSanitizer: treeSanitizer));
   }
 
   @JSName('insertAdjacentHTML')
   void _insertAdjacentHtml(String where, String text) native;
 
   /**
    * Inserts [element] into the DOM at the specified location.
    *
    * To see the possible values for [where], read the doc for
    * [insertAdjacentHtml].
@@ skipping 540 matching lines @@
   const ScrollAlignment._internal(this._value);
   toString() => 'ScrollAlignment.$_value';
 
   /// Attempt to align the element to the top of the scrollable area.
   static const TOP = const ScrollAlignment._internal('TOP');
   /// Attempt to center the element in the scrollable area.
   static const CENTER = const ScrollAlignment._internal('CENTER');
   /// Attempt to align the element to the bottom of the scrollable area.
   static const BOTTOM = const ScrollAlignment._internal('BOTTOM');
 }