Doc generator tweak to skip experimental domains.

pkg/analysis_server/tool/spec/api.dart

Index: pkg/analysis_server/tool/spec/api.dart
diff --git a/pkg/analysis_server/tool/spec/api.dart b/pkg/analysis_server/tool/spec/api.dart
index a558f17f4ab8e0887fc715f79cec97268b36c99e..3fd9d820e9994ca0a14993faf41e805b57fa0962 100644
--- a/pkg/analysis_server/tool/spec/api.dart
+++ b/pkg/analysis_server/tool/spec/api.dart
@@ -60,10 +60,12 @@ abstract class ApiVisitor<T> {
  */
 class Domain extends ApiNode {
   final String name;
+  final bool experimental;
   final List<Request> requests;
   final List<Notification> notifications;
 
-  Domain(this.name, this.requests, this.notifications, dom.Element html)
+  Domain(this.name, this.experimental, this.requests, this.notifications,
+      dom.Element html)
       : super(html);
 }