Automatically generate most constructors

client/dom/generated/src/interface/MediaController.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.
 
 // WARNING: Do not edit - generated code.
 
-interface MediaController {
+interface MediaController default _MediaControllerFactoryProvider {
+
+  MediaController();
 
   final TimeRanges buffered;
 
   num currentTime;
 
   num defaultPlaybackRate;
 
   final num duration;
 
   bool muted;
@@ skipping 11 matching lines @@
   void addEventListener(String type, EventListener listener, [bool useCapture]);
 
   bool dispatchEvent(Event evt);
 
   void pause();
 
   void play();
 
   void removeEventListener(String type, EventListener listener, [bool useCapture]);
 }