Convert DOM and HTML frog to dart2js.

lib/html/src/dart2js_IDBKeyRangeFactoryProvider.dart

 // 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.
 
 class _IDBKeyRangeFactoryProvider {
 
   factory IDBKeyRange.only(/*IDBKey*/ value) =>
       _only(_class(), _translateKey(value));
 
   factory IDBKeyRange.lowerBound(/*IDBKey*/ bound, [bool open = false]) =>
@@ skipping 27 matching lines @@
   static _IDBKeyRangeImpl _lowerBound(cls, bound, open) native
       '''return cls.lowerBound(bound, open);''';
 
   static _IDBKeyRangeImpl _upperBound(cls, bound, open) native
       '''return cls.upperBound(bound, open);''';
 
   static _IDBKeyRangeImpl _bound(cls, lower, upper, lowerOpen, upperOpen) native
       '''return cls.bound(lower, upper, lowerOpen, upperOpen);''';
 
 }