Include DDC fixes to dart:html in the main version

tools/dom/templates/html/impl/impl_HTMLSelectElement.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;
 
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 $!MEMBERS
 
   // Override default options, since IE returns SelectElement itself and it
   // does not operate as a List.
   List<OptionElement> get options {
-    var options = new List<OptionElement>.from(this.querySelectorAll('option'));
-    return new UnmodifiableListView(options);
+    var options = this.querySelectorAll<OptionElement>('option');

[vsm, 2017/05/24 13:11:49]

whoa -  a generic method in the dom!

+    return new UnmodifiableListView(options.toList());
   }
 
   List<OptionElement> get selectedOptions {
     // IE does not change the selected flag for single-selection items.
     if (this.multiple) {
       var options = this.options.where((o) => o.selected).toList();
       return new UnmodifiableListView(options);
     } else {
       return [this.options[this.selectedIndex]];
     }
   }
 }