Using an ordered set for Element.classes.

sdk/lib/svg/dart2js/svg_dart2js.dart

 library dart.dom.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 - unless you are editing documentation as per:
 // https://code.google.com/p/dart/wiki/ContributingHTMLDocumentation
@@ skipping 5740 matching lines @@
 
 
 class _AttributeClassSet extends CssClassSet {
   final Element _element;
 
   _AttributeClassSet(this._element);
 
   Set<String> readClasses() {
     var classname = _element.attributes['class'];
 
-    Set<String> s = new Set<String>();
+    Set<String> s = new LinkedHashSet<String>();
     if (classname == null) {
       return s;
     }
     for (String name in classname.split(' ')) {
       String trimmed = name.trim();
       if (!trimmed.isEmpty) {
         s.add(trimmed);
       }
     }
     return s;
@@ skipping 1955 matching lines @@
 
 
 @DocsEditable
 @DomName('SVGVKernElement')
 class _SVGVKernElement extends SvgElement native "*SVGVKernElement" {
 
   @DomName('SVGVKernElement.SVGVKernElement')
   @DocsEditable
   factory _SVGVKernElement() => _SvgElementFactoryProvider.createSvgElement_tag("vkern");
 }