Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/ValidityState.dart

Index: client/dom/generated/src/interface/ValidityState.dart
diff --git a/client/dom/generated/src/interface/ValidityState.dart b/client/dom/generated/src/interface/ValidityState.dart
index 722b6c8549eec62f4fba57024fa1b03a162dbc06..a078d270234b962760406258539fc1e36eef31ae 100644
--- a/client/dom/generated/src/interface/ValidityState.dart
+++ b/client/dom/generated/src/interface/ValidityState.dart
@@ -6,21 +6,21 @@
 
 interface ValidityState {
 
-  bool get customError();
+  final bool customError;
 
-  bool get patternMismatch();
+  final bool patternMismatch;
 
-  bool get rangeOverflow();
+  final bool rangeOverflow;
 
-  bool get rangeUnderflow();
+  final bool rangeUnderflow;
 
-  bool get stepMismatch();
+  final bool stepMismatch;
 
-  bool get tooLong();
+  final bool tooLong;
 
-  bool get typeMismatch();
+  final bool typeMismatch;
 
-  bool get valid();
+  final bool valid;
 
-  bool get valueMissing();
+  final bool valueMissing;
 }