Adding deprecated flag to deprecated members.

sdk/lib/html/src/shared_SVGFactoryProviders.dart

 // 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 svg;
 
 final _START_TAG_REGEXP = new RegExp('<(\\w+)');
 
 class _SvgElementFactoryProvider {
   static SvgElement createSvgElement_tag(String tag) {
     final Element temp =
       document.$dom_createElementNS("http://www.w3.org/2000/svg", tag);
     return temp;
   }
 
   static SvgElement createSvgElement_svg(String svg) {
     Element parentTag;
     final match = _START_TAG_REGEXP.firstMatch(svg);
     if (match != null && match.group(1).toLowerCase() == 'svg') {
       parentTag = new Element.tag('div');
     } else {
       parentTag = new SvgSvgElement();
     }
 
     parentTag.innerHtml = svg;
-    if (parentTag.elements.length == 1) return parentTag.elements.removeLast();
+    if (parentTag.children.length == 1) return parentTag.children.removeLast();
 
     throw new ArgumentError(
-        'SVG had ${parentTag.elements.length} '
-        'top-level elements but 1 expected');
+        'SVG had ${parentTag.children.length} '
+        'top-level children but 1 expected');
   }
 }
 
 class _SvgSvgElementFactoryProvider {
   static SvgSvgElement createSvgSvgElement() {
     final el = new SvgElement.tag("svg");
     // The SVG spec requires the version attribute to match the spec version
     el.attributes['version'] = "1.1";
     return el;
   }
 }