Use @Native annotation on dart2js DOM native classes

tools/dom/templates/html/impl/impl_IDBKeyRange.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;
 
-$(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
   @DomName('IDBKeyRange.only')
   factory KeyRange.only(/*Key*/ value) =>
       _KeyRangeFactoryProvider.create$(CLASSNAME)_only(value);
 
   @DomName('IDBKeyRange.lowerBound')
   factory KeyRange.lowerBound(/*Key*/ bound, [bool open = false]) =>
       _KeyRangeFactoryProvider.create$(CLASSNAME)_lowerBound(bound, open);
 
   @DomName('IDBKeyRange.upperBound')
   factory KeyRange.upperBound(/*Key*/ bound, [bool open = false]) =>
       _KeyRangeFactoryProvider.create$(CLASSNAME)_upperBound(bound, open);
 
   @DomName('KeyRange.bound')
   factory KeyRange.bound(/*Key*/ lower, /*Key*/ upper,
                             [bool lowerOpen = false, bool upperOpen = false]) =>
       _KeyRangeFactoryProvider.create$(CLASSNAME)_bound(
           lower, upper, lowerOpen, upperOpen);
 
 $!MEMBERS
 }