Removing dart:html APIs which were deprecated in M2.

sdk/lib/svg/dart2js/svg_dart2js.dart

 library svg;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:_js_helper' show Creates, Returns, JavaScriptIndexingBehavior, JSName;
 import 'dart:_foreign_helper' show JS;
 // DO NOT EDIT
 // Auto-generated dart:svg library.
@@ skipping 6415 matching lines @@
       _SvgElementFactoryProvider.createSvgElement_svg(svg);
 
   _AttributeClassSet _cssClassSet;
   CssClassSet get classes {
     if (_cssClassSet == null) {
       _cssClassSet = new _AttributeClassSet(this);
     }
     return _cssClassSet;
   }
 
-  @deprecated
-  List<Element> get elements => new FilteredElementList(this);
-
-  @deprecated
-  void set elements(Collection<Element> value) {
-    final elements = this.elements;
-    elements.clear();
-    elements.addAll(value);
-  }
-
   List<Element> get children => new FilteredElementList(this);
 
   void set children(List<Element> value) {
     final children = this.children;
     children.clear();
     children.addAll(value);
   }
 
   String get outerHtml {
     final container = new Element.tag("div");
@@ skipping 1584 matching lines @@
 
   List<ElementInstance> getRange(int start, int rangeLength) =>
       Lists.getRange(this, start, rangeLength, <ElementInstance>[]);
 
   // -- end List<ElementInstance> mixins.
 
   @DomName('SVGElementInstanceList.item')
   @DocsEditable
   ElementInstance item(int index) native;
 }