A bunch of fixes in idl database generator.

client/dom/generated/src/wrapping/_DOMURLWrappingImplementation.dart

 // Copyright (c) 2011, 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.
 
 class _DOMURLWrappingImplementation extends DOMWrapperBase implements DOMURL {
   _DOMURLWrappingImplementation() : super() {}
 
   static create__DOMURLWrappingImplementation() native {
     return new _DOMURLWrappingImplementation();
   }
 
-  String createObjectURL(Blob blob) {
-    return _createObjectURL(this, blob);
+  String createObjectURL(var blob_OR_stream) {
+    if (blob_OR_stream is MediaStream) {
+      return _createObjectURL(this, blob_OR_stream);
+    } else {
+      if (blob_OR_stream is Blob) {
+        return _createObjectURL_2(this, blob_OR_stream);
+      }
+    }
+    throw "Incorrect number or type of arguments";
   }
-  static String _createObjectURL(receiver, blob) native;
+  static String _createObjectURL(receiver, blob_OR_stream) native;
+  static String _createObjectURL_2(receiver, blob_OR_stream) native;
 
   void revokeObjectURL(String url) {
     _revokeObjectURL(this, url);
     return;
   }
   static void _revokeObjectURL(receiver, url) native;
 
   String get typeName() { return "DOMURL"; }
 }