Making all DOM types abstract and removing superfluous Dartium constructors.

tools/dom/templates/html/impl/impl_IDBIndex.darttemplate

 // Copyright (c) 2013, 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)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+$(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   @DomName('IDBIndex.count')
   Future<int> count([key_OR_range]) {
    try {
       var request;
       if (key_OR_range != null) {
         request = $dom_count(key_OR_range);
       } else {
         request = $dom_count();
       }
       return _completeRequest(request);
@@ skipping 73 matching lines @@
     if (direction == null) {
       request = $dom_openKeyCursor(key_OR_range);
     } else {
       request = $dom_openKeyCursor(key_OR_range, direction);
     }
     return ObjectStore._cursorStreamFromResult(request, autoAdvance);
   }
 
   $!MEMBERS
 }