A bunch of fixes in idl database generator.

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

Index: client/dom/generated/src/wrapping/_DOMURLWrappingImplementation.dart
diff --git a/client/dom/generated/src/wrapping/_DOMURLWrappingImplementation.dart b/client/dom/generated/src/wrapping/_DOMURLWrappingImplementation.dart
index 5b845016fcf4347b304dd57fddd3571c5c1e7f25..c0aa5ebec7d9c6c35af8aadfd3f6faeccd1391d6 100644
--- a/client/dom/generated/src/wrapping/_DOMURLWrappingImplementation.dart
+++ b/client/dom/generated/src/wrapping/_DOMURLWrappingImplementation.dart
@@ -11,10 +11,18 @@ class _DOMURLWrappingImplementation extends DOMWrapperBase implements DOMURL {
     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);