Adding deprecated flag to deprecated members.

sdk/lib/html/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 html;
 
 // TODO(jacobr): use _Lists.dart to remove some of the duplicated
 // functionality.
 class _ChildrenElementList implements List {
   // Raw Element.
@@ skipping 355 matching lines @@
     Map<String, String> attributes = this.attributes;
     attributes.clear();
     for (String key in value.keys) {
       attributes[key] = value[key];
     }
   }
 
   /**
    * Deprecated, use innerHtml instead.
    */
+  @deprecated
   String get innerHTML => this.innerHtml;
+  @deprecated
   void set innerHTML(String value) {
     this.innerHtml = value;
   }
 
+  @deprecated
   void set elements(Collection<Element> value) {
     this.children = value;
   }
 
   /**
    * Deprecated, use [children] instead.
    */
+  @deprecated
   List<Element> get elements => this.children;
 
   /**
    * @domName childElementCount, firstElementChild, lastElementChild,
    *   children, Node.nodes.add
    */
   List<Element> get children => new _ChildrenElementList._wrap(this);
 
   void set children(List<Element> value) {
     // Copy list first since we don't want liveness during iteration.
@@ skipping 228 matching lines @@
 $if DART2JS
   // Optimization to improve performance until the dart2js compiler inlines this
   // method.
   static Element createElement_tag(String tag) =>
       JS('Element', 'document.createElement(#)', tag);
 $else
   static Element createElement_tag(String tag) =>
       document.$dom_createElement(tag);
 $endif
 }