Merging dart:html interfaces and implementations

sdk/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 {
 
   static IDBKeyRange createIDBKeyRange_only(/*IDBKey*/ value) =>
       _only(_class(), _translateKey(value));
 
   static IDBKeyRange createIDBKeyRange_lowerBound(
@@ skipping 16 matching lines @@
     return _cachedClass = _uncachedClass();
   }
 
   static _uncachedClass() =>
     JS('var',
        '''window.webkitIDBKeyRange || window.mozIDBKeyRange ||
           window.msIDBKeyRange || window.IDBKeyRange''');
 
   static _translateKey(idbkey) => idbkey;  // TODO: fixme.
 
-  static _IDBKeyRangeImpl _only(cls, value) =>
-       JS('_IDBKeyRangeImpl', '#.only(#)', cls, value);
+  static IDBKeyRange _only(cls, value) =>
+       JS('IDBKeyRange', '#.only(#)', cls, value);
 
-  static _IDBKeyRangeImpl _lowerBound(cls, bound, open) =>
-       JS('_IDBKeyRangeImpl', '#.lowerBound(#, #)', cls, bound, open);
+  static IDBKeyRange _lowerBound(cls, bound, open) =>
+       JS('IDBKeyRange', '#.lowerBound(#, #)', cls, bound, open);
 
-  static _IDBKeyRangeImpl _upperBound(cls, bound, open) =>
-       JS('_IDBKeyRangeImpl', '#.upperBound(#, #)', cls, bound, open);
+  static IDBKeyRange _upperBound(cls, bound, open) =>
+       JS('IDBKeyRange', '#.upperBound(#, #)', cls, bound, open);
 
-  static _IDBKeyRangeImpl _bound(cls, lower, upper, lowerOpen, upperOpen) =>
-       JS('_IDBKeyRangeImpl', '#.bound(#, #, #, #)',
+  static IDBKeyRange _bound(cls, lower, upper, lowerOpen, upperOpen) =>
+       JS('IDBKeyRange', '#.bound(#, #, #, #)',
           cls, lower, upper, lowerOpen, upperOpen);
 }