https://codereview.chromium.org//23754012 resulted in some changes to the generated files but

sdk/lib/indexed_db/dartium/indexed_db_dartium.dart

 library dart.dom.indexed_db;
 
 import 'dart:async';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 // 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.
 
@@ skipping 101 matching lines @@
   @DocsEditable()
   Object get value native "IDBCursorWithValue_value_Getter";
 
 }
 // 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.
 
 
 @DocsEditable()
+/**
+ * An indexed database object for storing client-side data
+ * in web apps.
+ */
 @DomName('IDBDatabase')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX, '15')
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @Experimental()
 @Unstable()
 class Database extends EventTarget {
   @DomName('IDBDatabase.createObjectStore')
   @DocsEditable()
   ObjectStore createObjectStore(String name,
@@ skipping 909 matching lines @@
 
 // WARNING: Do not edit - generated code.
 
 
 @DocsEditable()
 @DomName('IDBAny')
 @deprecated // nonstandard
 abstract class _IDBAny extends NativeFieldWrapperClass1 {
 
 }